why generally speaking the world was colonised by europeans, definately more environmental factors than genetic ones. not that other areas havent had waring factions but the europeans went out of there way to conquer foriegn lands, and treat those people whos country they invaded as a lesser being. maybe it is in a europeans nature to have command and conquer mentality. were all to identical genetically for this to be the case but maybe europeans are the evolutionary mistake of the human race!