Modern theories of crime and delinquency tend to be individualistic in
their level of analysis and tend to focus on consensus crimes. The ph
enomenon of ethnic genocide is virtually impossible to examine within
such parameters. Recent histories of the Holocaust by Browning and Gol
dhagen suggest that it was carried out by ordinary citizens who suppor
ted its objectives, not by dysfunctional psychopaths. Nor was it carri
ed out by individuals intimidated by powerful authority structures. Th
is article reviews the evidence from the new historiographies and prop
oses a theory of genocide based on xenophobia developed in recent acco
unts of evolutionary psychology.