At this time it is safe to say that there is no known genetic abnormality associated specifically with violent crime. No particular national or ethnic or racial or religious group has proved itself to be innately and enduringly more violent than another. That is not to say that from time to time one or another group has not tried to so distinguish itself. There is, of course, a normal genetic condition, characteristic of about 50 percent of the human population, that is associated with violent crime: the XY syndrome, or being male. One can’t simply blame male violence on social conditioning.
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