Not long after the Iranian Revolution of 1979, in which Ayatollah Ruhollah Khomeini became supreme leader, a U.S. official was heard to exclaim: “Who ever took religion seriously?” The official was baffled at the interruption of what he assumed was an overwhelmingly powerful historical trend. Pretty well everyone at the time took it for granted that religion was on the way out, not only as a matter of personal belief, but even more as a deciding factor in politics. Secularization was advancing everywhere, and with increasing scientific knowledge and growing prosperity it was poised to become a universal human condition. True, there were some countries that remained stubbornly religious—including, ironically, the United States. But these were exceptions. Religion was an atavistic way of thinking which was gradually but inexorably losing its power. In universities, grandiose theories of secularization were taught as established fact, while politicians dismissed ideas they didn’t like as “mere theology.” The unimportance of religion was part of conventional wisdom, an unthinking assumption of those who liked to see themselves as thinking people.