Sex is a sideshow in the world of the animal, for the dominant color of that world is fear.

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

For the soundest of evolutionary reasons man appears at his best when times are worst.

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

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.

Natural selection deals ruthlessly with any population, bird or beaver, which fails to solve the problems of its environment with all those resources, learned or unlearned, which may be at its disposal.

Aggressiveness is the principal guarantor of survival.