The continuous disasters of man's history are mainly due to...

The continuous disasters of man's history are mainly due to his excessive capacity and urge to become identified with a tribe, nation, church or cause, and to espouse its credo uncritically and enthusiastically, even if its tenets are contrary to reason, devoid of self-interest and detrimental to the claims of self-preservation.We are thus driven to the unfashionable conclusion that the trouble with our species is not an excess of aggression, but an excess capacity for fanatical devotion.