At first, most appear to have affected an attitude of bemused tolerance toward the new philosophical and religious movements while privately embracing some version of cynical realpolitik. But as warring cities and principalities were replaced by great empires and especially, as those empires began to reach the limits of their expansion, sending the military-coinage-slavery complex into crisis, all this changed. In India, Aśoka tried to re-found his kingdom on Buddhism; in Rome, Constantine turned to the Christians; in China, the Han emperor Wu-Ti (157–87 BC), faced with a similar military and
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