The fateful question for the human species seems to me to be whether and to what extent their cultural development will succeed in mastering the disturbance of their communal life by the human instinct of aggression and self-destruction ... One thing only do I know for certain and that is that man's judgements of value follow directly from his wihes for happiness-that, accordingly, they are an attempt to support his illusions with arguments.
Sigmund FreudThe most ancient and important taboo prohibitions are the two basic laws of totemism: not to kill the totem animal and to avoid sexual intercourse with members of the totem clan of the opposite sex.
Sigmund Freud