Early mankind is called as " Neanderthal man ". In historic age mankind are grouped together for survival from man eating animals. For hibernation and for food they moved from one place to another place. They lived in caves, later they lived in hut built with animal bones and with tree branches. Even they form groups among themselves. They will fight among themselves, if any other group members enter into their surroundings. Even some are cannibals. i.e., they eat human fleshes. They have huge competition for females. To have sex with females, they even fight among themselves. Food and sex is the main part of their life’s.