I agree Miles. In my experience, critics are those who haven't studied evolution theory. Here are a couple of excellent texts for new students:
HUMAN NATURE AND PUBLIC POLICY, by Somit and Peterson.
EVOLUTIONARY THOUGHT IN PSYCHOLOGY, by Henry Plotkin.
Jay ------ All traits and tendencies of all living creatures -- no matter how they are generated during ontogeny or learning, including all aspects of culture, or whether they are a result of environmental variations or chance -- are necessarily products of organic evolution. There is no alternative. -- Richard D Alexander