The document summarizes the development of early civilizations in China, Nubia, and the Americas between 2200-250 BCE. In China, the Shang Dynasty ruled from 1750-1027 BCE in the Yellow River Valley and established oracle bone writing. The Zhou Dynasty then overthrew the Shang and split into the Western and Eastern Zhou periods. Philosophies like Confucianism, Daoism, and Legalism emerged. In Nubia, the Kingdom of Kush developed south of Egypt and the Kingdom of Meroë later ruled as far north as Egypt. The Olmec civilization in Mesoamerica built cities along the Gulf coast and established complex architecture, calendars, and sculpture. In