An Immense World of Delight
It used to be a commonplace of moralists that man was the only creature in the animal kingdom to slaughter his own kind. But as Chronicle writer Roger Gathman points out, kind is slaughtered by kind routinely among ants, salamanders, and, as any child can tell you, guppies. The golden rule, in nature, is not "do unto others" -- it is "why waste the protein?"
"...Nonzero: The Logic of Human Destiny by Robert Wright..."