What no human soul desires there is no need to prohibit; it is automatically excluded. The very emphasis of the commandment, Thou shalt not kill, makes it certain that we spring from an endless ancestry of murderers, with whom the lust for killing was in the blood, as possibly it is to this day with ourselves.

Sigmund Freud (1856-1939) Austrian psychoanalyst and neurologist

“Reflections upon War and Death” (2) (1915) [tr. Mayne (1963)]