Of all the attempts to pinpoint the origin of modernity—an exercise of which modernity never tires—my favorite begins with medieval monks. According to this account, it was the Benedictines who came up with the idea that it was possible to do the same thing, at the same time, every day. Although time was still widely regarded as fluid and coterminous with eternity, the monastery was governed by the rhythms of that most modern instrument: the clock. The monks rose together, ate together, and prayed together, starting and stopping each task at the appointed canonical hour. In time, their obsession with order seeped into the world at large. The tradesmen and merchants in town heard the monastery bells ring out eight times a day and began to synchronize their daily tasks to their rhythm. The butcher picked up his cleaver at Prime and set it down for lunch at None. Clerks hustled to finish their work by Vespers. Time became currency, something that could be spent or saved, and people increasingly turned to machines to make life more efficient. By the dawn of the Industrial Revolution, the religious impulse behind these regimens had been long forgotten. The monastery gave way to the factory. Ritual dissolved into routine.