Far from the tidy, linear timeline we were taught in school, Modern Man's evolution was a much more complicated affair. Mr. Stringer's book illustrates how contact with subspecies such as Neanderthal was much more common and for a much longer period that previously thought. My own hypothesis is that most of the old stories of the boogey-man and other tales told to restless children to keep them nearby at night were based upon that contact. Racism seems to be the genetically codified result. Recent research with babies conducted at the Yale School of Psychology with Professor Paul Bloom (Seen on CBS News: 60 Minutes), reinforced this, but also suggests the importance of teaching tolerance and social conscience to children as the grow, to offset this partially "hard-wired" condition.