"The pre-history of our species is hag-ridden with episodes of nightmarish ignorance and calamity, for which religion used to identify, not just the wrong explanation, but the wrong culprit. Human sacrifices were made preeminently in times of epidemics, useless prayers were uttered, bogus miracles attested to, and scapegoats - such as Jews or heretics or witches - hunted down and burned."