Blue men became expert.  Climate made unprofitable for Asian Andites.  Did not enslave; either adopted or killed captives.  Evolve into farmers via herding.  Family incompatible with unsettled life of.  Friction with agriculturists.  Hunting stage of civilization.  In Andite era, only extensive hunting areas were in North America, north of Turkestan.  Neanderthalers were great.  Sex rewards improved Neanderthal skills.