Hardly a month goes by without a media report proclaiming thatresearchers have discovered the gene for some complex human behavioror trait - intelligence, dyslexia, shyness, homosexuality. The practicalimplications of genetic research can bring great good - relieving parentsof self-blame for a child's schizophrenia or autism and possibly treatinggenetic diseases in the future. Other findings - or perniciousinterpretations of them - can cause great...