Not all societies. Fighting wars has usually been a profession for adults, and even today there are countries without military: http://en.wikipedia.org/wiki/Lis

Not all societies. Fighting wars has usually been a profession for adults, and even today there are countries without military: http://en.wikipedia.org/wiki/List_of_countries_without_armed_forces http://en.wikipedia.org/wiki/List_of_countries_without_armed...