He is the sort of rather simplistic evolutionary psychologist who thinks that every individual item of behaviour must be genetically controlled and have directly evolved for some specific purpose.

This can lead, and does in his case, to very reactionary views that traditional social mores are 'human nature' and cannot or should not be modified. For example, sex roles. He has called feminism 'evil':

http://www.psychologytoday.com/blog/the-sc...

His views on race are equally nasty:

http://209.85.229.132/search?q=cache:BHupm...

Also see his views on war, hate, and Ann Coulter:

http://www.psychologytoday.com/blog/the-sc... .

Even when he comes up with a result that we happen to like, I think we need to distrust him.