Animal language is a contagious expression of mood effecting communication between social partners.

What truly leads the evolutionary procession, in other words, is behavior.

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.

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?

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

Is it possible that the environmental severity of the 1930s induced-particularly in the most aware, alert, and compassionate of [British] men-a morality which makes no sense today?

What could not be denied was that in vast segments of the animal world natural selection of the most qualified individuals took place not by competition for females but by competition for space.