A preeminent scientist-and the world's most prominent atheist-asserts the irrationality of belief in God and the grievous harm religion has inflicted on society, from the Crusades to 9/11. With rigor and wit, Dawkins examines God in all his forms, from the sex-obsessed tyrant of the Old Testament to the more benign (but still illogical) Celestial Watchmaker favored by some Enlightenment thinkers. He eviscerates the major arguments for religion and...