One of the very strongest arguments against evolution has always been the tendency for every system, living or dead, individual or societal, moral or mundane, to wear out, deteriorate, or die. As is common to all experience, nothing, absolutely nothing, gets better on its own.

Horses only 15 inches high, 141 tree species in a single acre of tropical rain forest—what spectacular variety we see among living things, both variation within kind and the stupendous number of different kinds.