Polytheists found it perfectly acceptable that different people worshipped different gods and performed diverse rites and rituals. They rarely if ever fought, persecuted, or killed people just because of their religious beliefs. Monotheists, in contrast, believed that their God was the only god, and that He demanded universal obedience. Consequently, as Christianity and Islam spread around the world, so did the incidence of crusades, jihads, inquisitions, and religious discrimination.11
