giovedì 12 gennaio 2017

Praise of Passivity Michael Huemer

Notebook per
In Praise of Passivity Michael Huemer
riccardo-mariani@libero.it
Citation (APA): riccardo-mariani@libero.it. (2014). In Praise of Passivity Michael Huemer [Kindle Android version]. Retrieved from Amazon.com

Parte introduttiva
Nota - Posizione 2
esempi di ignoranza: protezionismo e terrorismo l ignoranza degli esperti valori: disaccordo disaccordo su tutta la linea come riconoscere quel che sappiamo xchè tanta ignoranza? 2 teorie (rat ign rat irrat) come distinguere l idealista dall ipocrita le scienze sociali sono scienze? conseguenze pratiche: nn votare trascura i problemi sociali indebolisci la democrazia non lottare x i tuoi ideali male fatto e male non impedito. asimmetria complessità. intervenire o no. asimmetrie
Evidenzia (giallo) - Posizione 2
In Praise of Passivity Michael Huemer
Evidenzia (giallo) - Posizione 11
1. Introduction
Nota - Posizione 11
t
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Voters, activists, and political leaders of the present day are in the position of medieval doctors. They hold simple, prescientific theories about the workings of society and the causes of social problems, from which they derive a variety of remedies– almost all of which prove either ineffectual or harmful. Society is a complex mechanism whose repair, if possible at all, would require a precise and detailed understanding of a kind that no one today possesses.
Nota - Posizione 26
x SOCIETÀ E IGNORANZA
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the wisest course for political agents is often simply to stop trying to solve society’s problems.
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x LA SOLUZIONE SUBOTTIMA
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2. What Don’t We Know?
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2.1. Public Ignorance of the Political System
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t
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Michael Delli Carpini and Scott Keeter give the flavor of public political knowledge in America: The most commonly known fact about George [H.W.] Bush’s opinions while he was president was that he hated broccoli. During the 1992 presidential campaign 89 percent of the public knew that Vice President Quayle was feuding with the television character Murphy Brown, but only 19 percent could characterize Bill Clinton’s record on the environment. Also during that campaign, 86 percent of the public knew that the Bushes’ dog was named Millie, yet only 15 percent knew that both presidential candidates supported the death penalty.
Nota - Posizione 40
x IGNORANZA PROV DEGLI AMERICANI
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International data indicate that Americans’ political knowledge is no more than moderately below average.[ 12,
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x APPENA SOTTO LA MEDIA
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2.2. Descriptive Social Theory: The Neglect of Expert Knowledge
Evidenzia (giallo) - Posizione 60
Fortunately, in some areas of social theory, one can find a clear, policy-relevant consensus among the experts. Unfortunately, this consensus is often boldly defied by both political leaders and the general public.
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x ESPERTI E PUBBLICO
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The vast majority of economists– the people whose profession is to study these kinds of things– oppose protectionism and believe that it harms the domestic economy. 2
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x PROTEZIONISMO
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even left-wing economists such as Paul Krugman, famous for advocating government management of the economy,[ 21] have signed on to this consensus.
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c
Evidenzia (giallo) - Posizione 75
When experts from opposite sides of the political spectrum converge on a given position, in contradiction to conventional opinion, who is the more likely victim of a cognitive bias: the community of experts, or the uneducated masses?
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c
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A second example is provided by the issue of terrorism,
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X ES TERRORISMO
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Experts whose careers center on the study of terrorism generally agree that terrorism functions as retaliation for specific government policies, especially for foreign military occupation of territories that the terrorists prize.[ 27,
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x ESPERTI
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Political leaders in countries subject to terrorist attacks, however, typically blame the attacks on fundamental and irreconcilable clashes of values, on the moral virtue of their own country and the sheer evil of the terrorists.
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x POPOLO E SCONTRO DI CIVILTÀ
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They hate our freedoms: our freedom of religion, our freedom of speech, our freedom to vote and assemble and disagree with each other.
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c
Evidenzia (giallo) - Posizione 109
2.3. Descriptive Social Theory: The Limits of Expertise
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t
Evidenzia (giallo) - Posizione 110
In light of the ignorance of typical political leaders and members of the general public, we might be tempted by the idea of rule by experts, as in Plato’s Republic.[ 28] [4] Unfortunately, when it comes to descriptive social theory, even the experts’ knowledge is unimpressive, as demonstrated recently by the social psychologist Phillip Tetlock.
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x ESPERTI E TETLOCK
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the best experts did only slightly better than chance at predicting outcomes.
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x POCO MEGLIO
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What the experts were good at was rationalizing their failures.
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x RAZIONALIZZAZIONE
Evidenzia (giallo) - Posizione 134
Might it be that experts have highly reliable beliefs about these untestable matters? There is no reason to think so. Typically, if a person proves unreliable whenever you actually test that person’s claims, it is reasonable to assume that that person is also unreliable with regard to the claims you did not test.
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x MATERIE NN TESTABILI
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Thus, experts are probably even less reliable when it comes to these untestable matters.
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c
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2.4. Evaluative Knowledge
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t
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There is no generally accepted theory– either among ordinary people or among experts– for any of the central evaluative categories of moral or political philosophy. There is no generally accepted theory of the good, the right, justice, authority, human rights, equality, or liberty.
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x DISACCORDO SULL ETICA
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We may be tempted to argue that while other people are unreliable about evaluative questions, we ourselves have the correct values.
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x IO HO RAGIONE
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I would suggest that we ought to be very suspicious of any attempt to treat ourselves as special,
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x IO NN SONO SPECIALE
Evidenzia (giallo) - Posizione 167
2.5. What We Know
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t
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I think we know that slavery is unjust, that democracy is superior to dictatorship, that torture is almost always wrong, that free markets work better than communist planning.
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x COSE CHE SAPPIAMO
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People often vociferously defend a policy while having no awareness of the literature on the subject.
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x LA LETTERATURA
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How can we recognize genuine political knowledge? I cannot offer a precise or complete answer to this question.
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x COME RICONOSCERE LA CONOSC
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Genuine political knowledge tends to be: 1. Simple.
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2. Accepted by experts.
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3. Non-ideological.
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4. Weak.
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x SOGGETTA A ECCEZIONI
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5. Specific and concrete.
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6. Supported by appropriate evidence.
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7. Undefeated by counter-evidence.
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Consider now the claim that democracy is better than dictatorship. This claim fares reasonably well with respect to the above list.
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x ES DEMOCR
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3. Why Don’t We Know?
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t
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3.1. Rational Ignorance and Irrationality
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The benefits of political knowledge are dubious. For the overwhelming majority of individuals, political knowledge makes no practical difference to how their lives go, since the probability of their causing a change in public policy is approximately zero.
Nota - Posizione 210
x L IGNORANZA POLITICA È RAZIONALE
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The costs of political knowledge, however, can be enormous, beginning with the costs in sheer time and effort.
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x COSTIVELEVATISSIMI
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cultivation of habits of epistemic rationality.
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x UN COSTO PARTICOLARE
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1. People act only when the benefits exceed the costs. 2. The benefits of acquiring political knowledge are minimal. 3. The costs of acquiring political knowledge are substantial. 4. Therefore, people will not acquire political knowledge.
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x CONCLUSIONE IN TRE PUNTI
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politician may have strong motives to discover which positions are popular among voters and campaign contributors. But this is quite a different matter from discovering which policies are truly best.
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x L INFORMAZ NEI POLITICI
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3.2. Who Cares about the Good of Society?
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t
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most of those who think of themselves as deeply moved by high ideals are not in fact so moved. This may seem a surprising claim. How
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x SENTIRSI SANTI
Evidenzia (giallo) - Posizione 252
I suggest that these individuals are chiefly moved, not by a desire for some noble ideal, but by a desire to perceive themselves as working for the noble ideal– not,
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x SENTIRSI IN PACE CON SE STESSI
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there is at least one way of distinguishing the desire for X from the desire to perceive oneself as promoting X. This is to observe the subject’s efforts at finding out what promotes X.
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x DISCERNERE I FALSI SANTI. COME FARE?
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It seems to me that most people who expend a great deal of effort promoting political causes expend very little effort attempting to make sure their beliefs are correct.
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x I FATTTI. NESSUNO STUDIA
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3.3. Social Theory Is Harder than You Think
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T
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There is another reason why human beings are terrible at figuring out political issues: it is a lot harder to figure things out than it appears.
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x SS È DIFFICILE. PIÙ CHE LA SCIENZA DURA
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We now know that all of these theories are utterly wrong, not even close to the truth. Yet all were widely accepted by the experts for centuries.
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x ELENCO TEORIE FALSE PER SECOLI
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the number of possible theories of any given phenomenon is enormous, if not infinite. Of these, all but one are false. So given just the information that T is a theory, the probability that T is correct is approximately zero.
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x NUMERO DELLE TEORIE POSSIBILI: INFIN
Evidenzia (giallo) - Posizione 303
Another factor is the widespread phenomenon of confirmation bias: when we think about a hypothesis, our natural tendency is to look for evidence supporting the hypothesis, not to look for ways of falsifying it. 7
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x BIAS OVUNQUE. CONF BIAS
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We now test hypotheses experimentally, making serious and explicit efforts at falsification. But when it comes to political ideology, no such techniques have been developed.
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x POLITICA E IDEOLOGIA
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questions are difficult to investigate because of the unavailability of controlled experiments. If we want to test whether fiscal stimulus cures recessions, we cannot prepare two identical societies, with identical recessions, and then apply fiscal stimulus in one society but not the other.
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x NO LABORATORI
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social phenomena are vastly more complex than the phenomena studied by physicists and chemists.
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c
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Generalizations about human behavior almost always contain “ceteris paribus” clauses. Almost any factor influencing our behavior can be amplified or moderated by numerous other factors. When we move to the behavior of an entire society, matters are only that much more complicated. If there are laws of social evolution, they are no doubt incredibly complex.
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x COETERIS PARIBUS
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But as Tetlock found, this rarely happens; most experts prefer to explain away their errors in ways that preserve the experts’ theoretical beliefs.
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x RAZIONALIZZAZIONI
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rationalizations.
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4. Practical Lessons
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t
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Fortunately, however, we are not completely ignorant, and we can derive some plausible recommendations for political agents.
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x NO ALLO SCETYICSMO ASSOLUTO
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4.1. Don’t Vote
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t
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Imagine that someone asks you for directions to a local restaurant. If you have no idea where the restaurant is, you should not make it up. You should not tell the person some guess that seems sort of plausible to you. You should tell them you don’t know and let them get directions from someone more knowledgeable.
Evidenzia (giallo) - Posizione 361
Ignorant voting is even worse than ignorant giving of directions, because voting is an exercise of political power (albeit a very small one)– to vote for a policy is not only to make a recommendation, but to request that the policy be imposed on others by force.
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x ANALOGIA
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One might suggest that citizens have an obligation to become informed, and then vote. But becoming sufficiently informed to know who is the best candidate in a given election is typically extremely difficult.
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x TROPPO ONEROSO IMPORRE L INFO
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4.2. Neglect Social Problems
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t
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Consider for example the problem of recreational drug use, which leads to health problems, addiction, and general deterioration of the lives of drug users and their families. Perhaps there is something government could do to solve the problem. But given the ignorance of political leaders, activists, and the public, a government attempt to solve the problem is unlikely to succeed.
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x ESEMPIO DROGA
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one might think that, if we were completely ignorant, our policies would be as likely to increase as to reduce the problem; but as long as we have some relevant knowledge and understanding, and we are aiming at a reduction in the problem, we should be at least slightly more likely to alleviate the problem than to exacerbate it.
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x OBIEZIONE: QUALCOSINA SO
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four reasons why this is wrong.
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First, any government policy that imposes requirements or prohibitions on citizens automatically has certain costs. One cost is the reduction of citizens’ freedom.
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x LA PROIB È GIÀ UN COSTO
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suffering on the part of those who violate the law and are subsequently punished by the legal system.
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x COSTO DEL PUNITO
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the monetary cost involved in implementing the policy.
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x COSTO BUROCRAZIA
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moral presumption against coercive interventions.
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x ETICA LIBERTY FIRST
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when the state actively intervenes in society– for example, by issuing commands and coercively harming those who disobey its commands– the state then becomes responsible for any resulting harms, in a way that the state would not be responsible for harms that it merely (through lack of knowledge) fails to prevent.
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x L OMISSIONE CI RENDE MENO COLPEVOLI
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Fourth and finally, a policy made under conditions of extreme ignorance is not equally likely to be beneficial as harmful; it is much more likely to be harmful.
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x PROB DANNO SEMPRE MAGGIORI
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It is here that we must recall the case of George Washington. Washington’s doctors, ignorant of the germ theory of disease and lacking in antibiotics, had no chance of curing Washington’s infection. The human body is a complex mechanism with parts that work together in specific ways. Nearly all things one might add to or take away from the body, and nearly all ways in which one might rearrange the parts of the body, will interfere with that mechanism. Indeed, almost all large changes in the body are fatal. Thus, given their state of ignorance, almost any treatment the former President’s doctors prescribed could be expected to be harmful. Society can be viewed as a vast mechanism, whose parts (individual human beings), like the parts of an organism, work together in extremely complex ways. 9
Nota - Posizione 427
x ESISTE UN EQ NATURALE: TURBARLO IN MODO INAPPROPRIATO È SEMPRE DANNOSO
Evidenzia (giallo) - Posizione 431
I am not arguing that states should never intervene in society. Some interventions are clearly justified. For instance, prohibitions on murder, theft, and assault are justified. What differentiates these from, say, a prohibition on recreational drug use? A number of differences might be cited, 10 but what is most relevant to this paper is the difference in the state of our knowledge with respect to these prohibitions. We know that prohibitions on murder are beneficial– there are no real counter-arguments to the claim, and all experts agree.
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x INTERVENTI PLAUSIBILI
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Rather than recommending universal non-intervention, I am advocating a strong burden of proof for those who advocate legal demands or prohibitions.
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x ONERE DELLA PROVA
Evidenzia (giallo) - Posizione 439
The same lesson applies to many other controversial issues, such as gun control, fiscal stimulus, the minimum wage, immigration, and so on.
Nota - Posizione 440
x CASI DUBBI DI NN INTERVENTO
Evidenzia (giallo) - Posizione 445
4.3. Weaken Democracy
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t
Evidenzia (giallo) - Posizione 449
for issues that are controversial or require careful reasoning or specialized knowledge, democracy is about the equivalent of drawing policies out of a hat.
Nota - Posizione 450
x DOVE NN FUNZIONA LA DEMOCR
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When an issue is controversial, the best solution is not to simply take a vote; the best solution is to remove the issue from the political arena– that
Nota - Posizione 453
c
Evidenzia (giallo) - Posizione 459
It is perhaps infeasible for a Constitution to include prohibitions on all the policies that would be controversial or whose effects would be unknown. A reasonable proxy would be to require large supermajority votes for the passage of any law. For example, a state could be designed in which a 70% vote of the legislature would be required to pass any new law, while a 30% vote would suffice to repeal any existing law.
Nota - Posizione 462
x SUPERMAGGIORANZE
Evidenzia (giallo) - Posizione 465
4.4. Don’t Fight for What You Believe In
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t
Evidenzia (giallo) - Posizione 466
Fighting for something, as I understand the term, involves fighting against someone. If one’s goal faces no (human) opposition, then one might be described as working for a cause (for instance, working to reduce tuberculosis, working to feed the poor) but not fighting for it. Thus, one normally fights for a cause only when what one is promoting is controversial.
Nota - Posizione 470
x SI LOTA SOLO SE C È era N NEMICO
Evidenzia (giallo) - Posizione 474
Fighting for a cause has significant costs. Typically, one expends a great deal of time and energy, while simultaneously imposing costs on others, particularly those who oppose one’s own political position. This time and energy is very likely to be wasted, since neither side knows the answer to the issue over which they contend.
Nota - Posizione 476
x I COSTI DELLA CAUSA
Evidenzia (giallo) - Posizione 476
In many cases, the effort is expended in bringing about a policy that turns out to be harmful or unjust.
Nota - Posizione 477
x ESIYI DEPRECABILI
Evidenzia (giallo) - Posizione 479
Thus, suppose you are deciding between donating time or money to Moveon.org (a left-wing political advocacy group), and donating time or money to the Against Malaria Foundation (a charity that fights malaria in the developing world). For those concerned about human welfare, the choice should be clear. Donations to Moveon.org may or may not affect public policy, and if they do, the effect may be either good or bad– that is a matter for debate. But donations to Against Malaria definitely save lives. No one disputes that. 12
Nota - Posizione 483
x UN CSSO ESEMPLARE
Evidenzia (giallo) - Posizione 490
5. Conclusion
Nota - Posizione 490
t

Stereotipi sugli stereotipi

Secondo il John J. Ray di "DO WE STEREOTYPE STEREOTYPING? STEREOTYPING AND RACISM" non esiste alcun collegamento tra razzismo e pregiudizi. L'autore passa in rassegna la letteratura scientifica disponibile sui pregiudizi.
La tesi è chiara...
... A notion that seems to figure prominently in most explanations of racism is the notion of stereotyping. It certainly seems to occur in almost all elementary psychology and social psychology textbook accounts of racism. It will be submitted here, however, that even a desultory reading of the social cognition literature pushes us towards the view that stereotyping neither causes racism nor has any useful role in its explanation...
Molti, purtroppo, credono ancora in una versione superata del concetto di pregiudizio.
Facciamo il caso sintomatico di un autore influente come Lippman...
... as Weber & Crocker (1983) point out, the old Lippman view of stereotypes as being mythical, rigidly held and highly resistant to change still seems to be widely believed among psychologists...
Ma già a quei tempi c'è chi seminava dubbi...
... More careful writers (e.g. Allport, 1954) admit that stereotypes may often have a "kernel of truth"...
La teoria etnocentrica stabiliva poi un collegamento robusto tra la concezione ortodossa del pregiudizio e il razzismo. Autori di riferimento: Sumner (1906), Adorno, Frenkel-Brunswik, Levinson & Sanford (1950). La teoria....
... This theory predicts that people who place a high value on their own group will tend to scorn outgroups...
Ma esiste davvero una correlazione, per esempio, tra odio per lo straniero e sopravvalutazione del proprio gruppo di appartenenza?  Driedger & Clifton (1984) ci dicono che è scarsa...
... From their Table III we find that the correlation between autostereotype and heterostereotype is in only one case out of 24 above... Thinking well of your own group, in other words, has virtually nothing to do with thinking ill of other groups....
Altra ricerca dalle conclusioni ancor più radicali...
... For example: "Not only is ingroup favoritism in the laboratory situation not related to outgroup dislike, it also does not seem causally dependant on denigration of the outgroup" (Turner, 1978)...
Pensar bene di sè e del proprio gruppo non implica odio per gli altri. Autori di riferimento: Brewer & Collins (1981, p. 350) and Brown, Condor, Matthews, Wade & Williams (1986), Ray & Furnham, 1984; Heaven, Rajab & Ray, 1985 and Ray & Lovejoy, 1986.
La teoria contraria è più probabile: l'autostima ci spinge ad instaurare relazioni più sane con lo straniero...
... There is, furthermore, a substantial body of thought which sees pro-ingroup sentiment as something like self-esteem --i.e. a positive influence and a basis for a healthy, adaptive and positive view of the world. It is hard to think well of outgroups if you do not think well of your own group...
Autori: Mihalyi, 1984/ 85), Cairns (1982), Furnham & Kirris (1983) and Elwert (1982).
Ma gli stereotipi sono accurati?
Di certo sono differenziati per gruppo etnico, il che è un indice di accuratezza...
... Stereotyping studies in fact almost invariably find that responses to different ethnic groups are highly differentiated (e.g. Kippax & Brigden, 1967; Gallois, Callan & Parslow, 1982; Callan & Gallois, 1983; Houser, 1979).... what is believed of one ethnic group is not believed of others. Jews, for instance, are seen as different from blacks... Asians might be seen as "industrious" and blacks as "dirty"...
Altri autori sul punto: Newman, Liss & Sherman (1983), Ray (1974) and Ray & Lovejoy (1986).
Altro indice di accuratezza: c'è accordo tra gruppi nel sostenere uno  stereotipo, spesso anche con il gruppo interessato dallo stereotipo...
... There also seems to be a not inconsiderable tendency for agreement between the in- and the out-group concerning the characteristics of the in-group...
Un esempio...
... For instance, Callan & Gallois (1983) found that Anglo-Australians, Greek-Australians and Italian-Australians all showed a high level of agreement that Anglo-Australians were "sportsmanlike", "happy-go-lucky" and "pleasure-loving"...
Altro esempio...
... See also Kippax & Brigden (1977), where Australian and American opinions about one-another and various other nationalities are shown to have a lot in common...
Chi discrimina lo fa in modo altamente differenziato...
... Gallois, Callan & Parslow (1982) that people who discriminate on ethnic grounds do so in highly differentiated ways... On matters of interest to him (i.e. racial and ethnic matters) the racially discriminatory person is cognitively complex rather than cognitively simple (See also Ray, 1972a)....
Gli stereotipi positivi fanno bene?
Si direbbe di no...
... Viljoen (1974) found that South African Blacks thought higher of English-speaking whites than they did of themselves yet those same blacks still liked their own group best in other ways. In particular, blacks preferred more social distance from the English-speaking whites than from other blacks. To put it plainly, the blacks thought that the English- speakers were admirable but still did not like the thought of their daughters marrying one....
Lo stereotipo positivo allarga la distanza sociale e ostacola l'integrazione tra gruppi: Miller (1985).
Un esempio di scuola...
... Australian schoolchildren (whites) who had large numbers of blacks (Australian Aborigines) in their classes resented black welfare programs most when they had positive stereotypes of blacks....
La politica delle quote è spesso sostenuta da chi nutre pregiudizi negativi sulla minoranza...
... Conversely, the people who accepted affirmative action programs uncritically were those whites who thought very poorly of blacks...
Concllusione...
... The simple idea that positive stereotypes are good and negative stereotypes are bad is thus revealed as an oversimplification...
Il primo autore a sostenere la funzione benigna degli stereotipi fu Schutz (1932). Tesi...
... If you can categorize people, you have to make less effort in order to interact constructively with them...
Lo stereotipo è uno strumento conoscitivo, come la generalizzazione e l'astrazione. La guerra agli stereotipi in fondo è una piccola  guerra alla scienza...
Altro autore...
... Berry (1970) is one of many who concede that stereotypes can indeed have a useful role.... stereotypes are an aid in accurately knowing what the key (i.e. different) traits of various groups are... enabling us to deal with difficult and ambiguous data...
Lo stereotipo non fa che mettere  a frutto l'informazione minima e ridurre l'incertezza...
... It is a great human strength that we can make great use of even the tiniest amounts of information...
Sulla natura generalizzante degli stereotipi...
... Hamill, Wilson & Nisbett (1980) found that people will generalize from a single instance even when they are specifically told in advance that the instance concerned is an a-typical one...
Sulla loro natura adattiva...
... Doing so, however, does not mean that some rigid mental structure has been adopted. Quite to the contrary, stereotypes are approximations. They are continually modified as information comes in...
Lo stereotipo è un'approssimazione in itinere. Autori: Locksley, Hepburn & Ortiz, 1982.
Un esempio...
... show that when a target person is being evaluated by Ss, the provision of case information about that individual target person will substantially reduce the role of stereotypes in the evaluation made of the target person by the Ss...
Il lavoro di Galper & Weiss (1975)...
... stereotyping was not used where the situation was more fully specified...
Altro caso...
... Braithwaite, Gibson & Holman (1985-86)... stereotyping diminishes as the experimental situation becomes more realistic....
Conclusione possibile...
... Beyond the point where better information than what is contained in the stereotype becomes available, however, the stereotype is steadily abandoned as a guide to action....
Lo stereotipo persiste in assenza di informazioni...
... Where stereotypes persist, however, are those situations where specific information will seldom be adequate or available soon enough. For instance, when confronted by an unfamiliar black, a white does not conclude that he has no information to guide him in the interaction. He instead uses his stereotypes...
Lo stereotipo persiste nelle situazioni anonime...
... Thus a white who encounters a large black coming towards him on a dark street late at night will not normally approach the encounter with an empty mind...
Lo stereotipo si aggiorna con la presa di contatto specifica...
... If, however, the black simply says "Nice day" when he passes, the stereotype will no longer have any role in the interaction and some pleasantry in reply may be uttered...
Studi a supporto: Stein, Hardyck &Smith (1965), McCauley, Stitt & Segal (1980) and Bond (1986).
Un esempio tratto da Bayton, McAlister & Hamer (1956).
... These authors described a person to students simply as "black" and got the usual stereotypes back: "dirty", "lazy" etc. They then modified the description to "educated black" and instantly got greatly changed responses. The educated black was in fact described in terms very similar to an educated white...
Cos'è allora uno stereotipo?...
... Rather, stereotyping is a process of successive approximation towards accurate judgments...
Lo stereotipo fa parte a pieno titolo della razionalità bayesiana...
... The stereotype may start out containing very little in the way of accurate information but as knowledge of and experience with the particular class of person accumulates, the information will become progressively more accurate...
Autori a supporto: Locksley et al, 1982; Galper & Weiss, 1975; Braithwaite et al, 1985- 86; McCauley et al, 1980; Stein, Hardyck & Smith, 1965.
Eppure ci sono anche studi che mostrano la rigidità dei pregiudizi: Pettigrew, 1979; Johnson & Judd, 1983; Darley & Gross, 1983.
Ma non è affatto razionale abbandonare uno stereotipo in seguito ad un'eccezione: "una rondine non fa primavera". Questi autori s3mbrano trascurarlo.
... We do not immediately abandon or revise the rule but instead wait until several or maybe many exceptions build up. If blacks are generally seen by whites as lazy, one diligent black man will not disturb that stereotype. "One swallow does not make a summer". If, however, lots of diligent black men are encountered, cognitive change will eventuate (Weber & Crocker, 1983)...
Gli autori che sostengono la rigidità non colgono quanto sia razionale tollerare delle eccezioni, sono vittime di un' idealizzazione popperiana della conoscenza...
... Writers such as Pettigrew simply fail to consider adequately how many exceptions (to a rule) will be tolerated...
Conclusione: lo stereotipo non è il primo passo verso il razzismo ma verso la conoscenza in generale...
... Stereotyping may be involved as a step in the formation of racially antagonistic attitudes but it is involved as a step in the formation of all attitudes...
Tanto è vero che anche il tollerante ha i suoi bravi stereotipi, solo che li nasconde...
... Devine showed that "tolerant" people do not differ in their awareness of stereotypes from non-tolerant people but that the tolerant people deliberately suppress their use of stereotypes...
Altri autori a sostegno: Smith, Griffith, Griffith & Steger (1980).
Esempio di studio...
... These authors studied stereotypes of Germans held by American students who had been living in Germany for some time. They found that the students had stereotypes that were realistic and positive and concluded that stereotyping is of little use in explaining racial and ethnic antagonisms...
Ma se i pregiudizi non spiegano il razzismo, quali sono le teorie alternative più promettenti?...
... Perhaps the most hopeful line of enquiry for psychologists, however, may be those theories and findings which portray racial preferences as just another instance of a more general human tendency to prefer the familiar and thus to prefer people who are similar to themselves (Rokeach, 1960; Stein, Hardyck & Smith, 1965; Levine & Campbell, 1972; Liebowitz & Lombardo, 1980; Taylor & Guimond, 1978; Byrne, Clore & Smeaton, 1986; Marin & Salazar, 1985; Ray, 1983)...
Un forte sentimento comunitario può facilmente evolvere in razzismo. In questo senso sono i pilastri della comunità i soggetti più a rischio.

Ode al sacchetto di plastica

Non è mia ma di Katherine Mangu-Ward, io la trovo solo convincente.
Cose più spesse di un sacchetto di plastica...
... A strand of hair. A coat of paint. A human cornea...
Per dire, il sacchetto di plastica è un miracolo della tecnologia umana...
... Despite weighing less than 5 grams, one bag can hold 17 pounds, well over 1,000 times its own weight...
Economico e funzionale: cosa vuoi di più dalla vita?
Eppure, questa meraviglia è diventata il bersaglio prediletto dell'ambientalista d'assalto. Ovunque è proibito o tassato.
L'accusa:
... coastal areas blame the wispy totes for everything from asphyxiated sea turtles to melting glaciers, while inland banners decry the bags' role in urban landscape pollution and thoughtless consumerism...
Ma si tratta di accuse dubbie: il sospetto è che attaccare il sacchetto di plastica sia un atto simbolico in sfregio al consumismo.
In realtà potremmo considerare il sacchetto di plastica come...
... one of the most efficient, resource-saving inventions of the 20th century...
Facciamo un po'di storia: prima dell'ottocento i mezzi per trasportare gli acquisti al dettaglio erano interamente a cura dell'acquirente...
... baskets for the little stuff and wheeled carts for the bigger... scraps of canvas or other durable fabric...
Inconvenienti: scomodità, germi e necessità di lavaggi frequenti...
... This was back when the germ theory of disease was yet to be broadly accepted, and there were not yet Laundromats on every street corner...
Poi la carta cominciò a diventare conveniente dominando la scena per un secolo...
... The paper bag was invented in the 1850s, but it wasn't until the 1870s that a factory girl named Margaret Knight cobbled together a machine that cut, folded, and glued flat-bottomed paper receptacles....
Pechmann fu il primo eroe della plastica...
... German chemist Hans von Pechmann was messing around with methane and ether in a lab in 1898 when he happened to notice a waxy precipitate called polymethylene...
Seguito da Du Pont...
... 30 years would pass before DuPont chemists stumbled upon a similar compound, polyethylene. This time, the British figured out they could use it to insulate radar cables, which is where the substance served its war duty...
E infine da Ziegler...
... In 1953, Karl Ziegler of the Kaiser Wilhelm Institute (later re-christened the Max Planck Institute, for obvious reasons) and Erhard Holzkamp invented high-density polyethylene (HDPE) and soon after figured out how to use it to make pipes...
Poi arrivò Thulin Sfen, il vero protagonista di questa storia...
... But Gustaf Thulin Sten is the real hero (or villain, depending on your point of view) of our tale. An employee of the Swedish company Celloplast, Sten was the person who had the inspiration to punch holes into the side of super-thin tubes of HDPE, thus creating the ubiquitous, filmy "T-shirt bags" we know and love (to ban) today...
Nel 1985 la plastica era più conveniente della carta dell' 11,5%.
La conservazione delle foreste era affare importante negli anni ottanta, ma poi subentrò la fissa per il global warming: carta o plastica? Da sempre l'imbarazzo ambientalista è stato grande...
... Forest conservation was a big deal in the '80s, a point in favor of plastic. But fossil fuels were a no-no, so maybe paper was better?...
Oggi, sacchetto di plastica uguale consumismo...
... In 2010, Guinness World Records named plastic bags the most ubiquitous consumer item in the world...
Cominciò la serie delle proibizioni a raffica...
... South Africans refer to bags snagged in bushes as their "national flower." In Washington, D.C., concern about used plastic bags finding their way down storm drains, through the Anacostia River, and into the Chesapeake Bay was the primary justification for the capital city's 5-cent bag tax in 2010, under the slogan "Skip the Bag, Save the River."...
Trattiamo l'accusa di essere un rifiuto onnipresente, specie su spiagge e fiumi. Ebbene, il sacchetto è un rifiuto forse più visibile di altri ma in realtà molto meno invasivo di quel che si pensa comunemente ...
... In 2006, the California Coastal Commission claimed that plastic bags make up 3.8 percent of beach litter, and a few years later the California Ocean Protection Council upped the ante to 8 percent of all coastal trash...
3,8%!?...
... But the definitive American litter study— yep, such a thing exists— reports much lower figures. The 2009 Keep America Beautiful Survey, run by Steven Stein of Environmental Resources Planning, shows that all plastic bags, of which plastic retail bags are only a subset, are just 0.6 percent of visible litter nationwide...
0,6%!!
Constatiamo poi con rammarico quanto  la metodologia dei primi studi fosse a dir poco dubbia...
... And those California data? They come from the International Coastal Commission (ICC), which the California Coastal Commission notes relies on information "collected by volunteers on one day each year, and is not a scientific assessment."...
Nei fiumi i sacchetti sono almeno al terzo posto come presenza...
... only the third-largest contributor to litter in the river, after food wrappers and bottles and cans...
Veniamo ora all'accusa di minacciare la vita marina.
Ecco un esempio sintomatico di allarmismo...
... The Blue Ocean Society for Marine Conservation is just one organization among many that claim that more than 1 million birds and 100,000 marine mammals and sea turtles die each year from eating or getting entangled in plastic...
Le fonti di certe dicerie...
... source this figure back to a study funded by the Canadian government that tracked loss of marine animals in Newfoundland as a result of incidental catch and entanglement in fishing gear from 1981 to 1984. Importantly, this three-decade-old study had nothing to do with plastic bags at all...
La goffa retromarcia di Greenpeace...
... As David Santillo, a senior biologist with Greenpeace, told The Times of London, "It's very unlikely that many animals are killed by plastic bags. The evidence shows just the opposite. We are not going to solve the problem of waste by focusing on plastic bags. With larger mammals it's fishing gear that's the big problem. On a global basis plastic bags aren't an issue."...
E sul fronte del global warming? Il sacchetto di plastica è davvero la minaccia di cui si dice? Per saperlo bisognerebbe calcolarne l' "impronta ecologica"...
... A 2011 study from the U.K.' s Environmental Agency attempted to quantify the emissions footprint both of plastic bags and of their substitutes...
Quanti riutilizzi richiedono i succedanei del sacchetto di plastica per compensare la sua impronta ecologica?...
... Holding the typical HDPE grocery bag up as the standard, researchers found that the common reusable non-woven polypropylene bag— the ubiquitous crinkly plastic tote, typically made with oil— had to be used at least 11 times to hold its own against an HDPE grocery bag. Cotton bags had to be used an amazing 131 times to do the same...
11 e 131. Non male. Ma studi del genere restano comunque deficitari: assumono che i sacchetti non vengano mai riutilizzati e che le borse non vengano mai lavate...
... U.K. Environmental Agency figures assume the HDPE bag is not being reused. Nor do they account for the energy and materials needed to regularly wash the reusable bags in hot soapy water...
In realtà, il riutilizzo del sacchetto è la norma...
... About 65 percent of Americans report that they repurpose their grocery bags for garbage. By contrast, a survey by the marketing research firm Edelman Berland found that consumers reported forgetting their reusable bags on 40 percent of grocery trips and opted for plastic or paper instead. Prior to the movement to ban plastic bags, many American homes had a nook, cranny, or drawer that functioned as a kind of grocery-sack clown car. It seemed that whatever the size of the container, an infinite number of bags could be stuffed inside...
Altra accusa: troppi sacchetti in giro, nessuno ricicla...
... 100 billion plastic bags that are thrown away in the U.S. every year."...
Nessuno sa da dove arrivino questi numeri. I numeri da prendere più seriamente sono altri...
... In 2010, according to the U.S. Environmental Protection Agency, Americans threw away 690,000 tons of HDPE bags. Of those, approximately 30,000 tons were recycled. That means a total of 660,000 tons were discarded, mostly into landfills (approximately 82 percent of non-recovered municipal solid waste goes to landfill; 18 percent is incinerated)...
Ma soprattutto: il riciclo delle alternative al sacchetto non è certo più massiccio...
... That same year, Americans also chucked almost exactly the same amount of "reusable" polypropylene bags (680,000 tons), of which zero were recovered... reusable bags actually constituted a slightly higher proportion of all bags going to landfills....
Ma il mancato riciclo sembra un peccato veniale: riciclare non conviene, è un mero spreco di risorse...
... In April, NPR's Planet Money reported on the economics of plastic recycling, and noted that while recycled plastic from bags and sacks was once a profitable industry, times have changed. The prices of oil and gas have fallen, which means it is cheaper to just make new bags rather than undertake the laborious process of recycling the old ones. As Tom Outerbridge, who runs a Brooklyn recycling center called Sims, explained, "We can't afford to put a lot of time and money into trying to recycle it" if no one's buying the final product....
Il ritorno delle borse riutilizzabili è in realtà un ritorno alla sporcizia della nonna...
... reminiscent of the sub-hygienic reality faced by my great-great-grandmother,...
Il modo migliore per beccarsi una diarrea...
... Put a leaky package of chicken in your cloth or plastic tote. Then go home, empty the bag, crumple it up, and toss it in the trunk of your car to fester. A week later, you go shopping again and throw some veggies you're planning to eat raw into the same bag. Cue diarrhea....
Presenze inquietanti nella metà delle borse riutilizzabili...
... A 2011 survey published in the journal Food Protection Trends found coliform bacteria in fully half of the reusable shopping bags tested...
Altre ricerche sulla scarsa igiene delle borse alternative al sacchetto di plastica...
... The same 2014 Edelman Berland study that found consumers frequently forgot their bags also unearthed the fact that only 18 percent of shoppers reported cleaning their bags "once a week or more." An article in the Journal of Infectious Diseases traced a 2010 outbreak of norovirus to nine members of an Oregon soccer team who had touched or eaten food stored in a contaminated reusable bag...
Conclusione...
... technology behind plastic grocery bags is so useful it won a Nobel Prize... Employing an unimaginably small amount of base material... Far from being the environmental threat activists make them out to be, plastic bags are not particularly to blame for clogged sewers, choked rivers, asphyxiated sea animals, or global warming. Instead, they are likely our best bet for carrying all of our junk in a responsible manner....
cello