Excellent, open access genome-wide association study here: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0045086#pone.0045086.s004 http://jou

Excellent, open access genome-wide association study here: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0045086#pone.0045086.s004 http://journals.plos.org/plosone/article?id=10.1371/journal.... No SNP was significant, nor any single gene. MAO-A (the "warrior gene") is ruled out. However, many genes showed strong association with Anti-Social Personality Disorder, with multiple alleles working together. My read is that these behavior patterns emerge in certain brain phenotypes, combinations of which were advantageous in antiquity. But much of that genetic information was stored as allele distribution, and we've lost a lot of that data with generations of assortative mating.