Descent of Man Theory: Disproved by Molecular Biology
http://www.FreeRepublic.com/forum/a3b47d7b94f92.htm
Whatever "evolutionary changes" occured in the brains of the human line, humans themselves have a remarkable lack of genetic diversity. IMHO the best interpretation of the evidence presented in the above thread (articles and posts) is that the earliest man appeared 50K ago or less.