The political, economic, and religious structures of ancient societies, from hunter-gatherers to the first civilizations, were based upon the systems of food production and distribution. The production of agricultural food surpluses and the development of communal food-storage and irrigation systems fostered political centralization; agricultural fertility rituals developed into state religions; food became a medium of payment and taxation; feasts were used to garner influence and demonstrate status; food handouts were used to define and reinforce power structures. Throughout the ancient world, long before the invention of money, food was wealth—and control of food was power.