Aggressiveness is the principal guarantor of survival.

A human being is a problem in search of a solution.

If we defend the title to our land or the sovereignty of our country, we do it for reasons no different, no less innate than do lower animals.

Human war has been the most successful of our cultural traditions

But we were born of risen apes, not fallen angels, and the apes were armed killers besides. And so what shall we wonder at? Our murders and massacres and missiles, and our irreconcilable regiments? Or our treaties whatever they may be worth; our symphonies however seldom they may be played; our peaceful acres, however frequently they may be converted into battlefields; our dreams however rarely they may be accomplished. The miracle of man is not how far he has sunk but how magnificently he has risen. We are known among the stars by our poems, not our corpses.

Like every living thing its prime characteristic is a blind, unreasoned instinct to survive.