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.

We are born of risen apes, not fallen angels.

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.

If you watch lizards and lions copulating, then you will see that in 200 million years the male has not had a single new idea.

Not in innocence, and not in Asia, was mankind born. The home of our fathers was that African highland reaching north from the Cape to the Lakes of the Nile. Here we came about-slowly, ever so slowly-on a sky-swept savannah glowing with menace.

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

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?