They were evolved for a world in which people lived in very small groups, rarely met anybody who was terribly different from themselves, had rather short lives in which there were few choices and the highest priority was to eat and mate today.
私達の脳は人々が 小規模な集団で暮らし 自分達とひどく異なる人々に めったに会う事もなく 今より短命で 選択肢は少なく 優先は食べることと 子孫を残す事という世界で進化してきました