There is a psychological fact that, I believe, provides a powerful incentive for people to cling to genetic theories. We human beings don’t like feeling responsible: as individuals for our own actions; as parents for our children’s hurts; or as a society for our many failings. Genetics—that neutral, impassive, impersonal handmaiden of Nature—would absolve us of responsibility and of its ominous shadow, guilt. If genetics ruled our fate, we would not need to blame ourselves or anyone else. Genetic explanations get us off the hook. The possibility does not occur to us that we can accept or
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