the core period of Jasper’s Axial age—the lifetimes of Pythagoras, Confucius, and the Buddha—corresponds almost exactly to the period in which coinage was invented. What’s more, the three parts of the world where coins were first invented were also the very parts of the world where those sages lived; in fact, they became the epicenters of Axial Age religious and philosophical creativity: the kingdoms and city-states around the Yellow River in China, the Ganges valley in northern India, and the shores of the Aegean Sea.
