A true bond of friendship is usually only possible between people of roughly equal status. This equality is demonstrated in many indirect ways, but it is reinforced in face-to-face encounters by a matching of the posture of relaxation or alertness.

We may prefer to think of ourselves as fallen angels, but in reality we are rising apes.

We are to put it mildly, in a mess, and there is a strong chance that we shall have exterminated ourselves by the end of the century. Our only consolation will be that as a species, we have had an exciting term of office.

No matter how old we become, we can still call them 'Holy Mother' and 'Father' and put a child-like trust in them.

Life is like a very short visit to a toy shop between birth and death.

The city is not a concrete jungle, it is a human zoo.

Sexual behavior in our species goes through three characteristic phases: pair formation, precopulatory activity, and copulation, usually but not always in that order. The pair-formation stage, usually referred to as courtship, is remarkably prolonged by animal standards.