Civilizations first emerged along major river valleys, including in Mesopotamia, Egypt, the Indus Valley, and China. In Mesopotamia, the Sumerians established the world's first empire and city-states, developing new technologies like bronze and influencing later cultures. Egypt saw the rise of powerful pharaohs and construction of pyramids under the Old Kingdom, as well as the development of Egyptian religion, social structure, and technology. Along the Indus River, the Indus Valley civilization constructed well-planned cities and established one of the world's earliest writing systems. China's Shang and Zhou dynasties were influenced by geography and established family, religious beliefs, and ideographic