Cash markets arose through war: again, largely through tax and tribute policies that were originally designed to provision soldiers, but that later became useful in all sorts of other ways besides. It was only the Middle Ages, with their return to credit systems, that saw the first manifestations of what might be called market populism: the idea that markets could exist beyond, against, and outside of states, as in those of the Muslim Indian Ocean—an idea that was later to reappear in China with the great silver revolts of the fifteenth century.
