If the history-deniers who doubt the fact of evolution are ignorant of biology, those who think the world began less than ten thousand years ago are worse than ignorant, they are deluded to the point of perversity. They are denying not only the facts of biology but those of physics, geology, cosmology, archaeology, history and chemistry as well.

It often turns out on closer inspection that acts of apparent altruism are really selfishness in disguise.

Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful.