The Mississippian people (AD 800–1650) were the largest and most complex society to develop in the eastern half of North America. Living near rivers in the Midwest and Southeast, they created highly developed, agriculturally based communities that were mostly fortified and contained large earthen mounds and broad plazas. These towns and cities were the center of political, social, and ceremonial life in this period. Like many other cultures in the world, the Mississippians had a ranked society, which included commoners, warriors, ritual elite, and chiefs. These chiefs were often considered godlike by their people, sometimes referred to as the Sun. The economic basis for most of the Mississippian centers was the harvesting of flora (plants) and fauna (animals). Corn, or maize, was the dominant crop, but other plants, whether grown or gathered, such as beans, squash, sump weed, acorns, and sunflowers, played an important role. This plant-based diet was supplemented with large and small game, such as bison, deer, and rabbit, as well as fish.