Joseph McCabe,
The Human Origin of Morals — Chapter V. Moral Eccentricities
“ Tribal organization and hunting involve conflicts about encroachments on each other's grounds or areas. Conflicts lead to wars. "Savagery" becomes a social quality. The tribe, in self-defense, wants fierce and ruthless warriors. Spies and prisoners must be tortured and killed. The world begins to run with blood. And since conscience is the interpreter of custom, of the interests of the tribe, it sanctions everything.The growth of society while man is still so imperfect helps this. Men accumulate "property," and other men steal it. A prettily carved stick or a deadly spear tempts a neighbor. ”
