From 1200 BCE to 900 CE, the world witnessed the rise of powerful new states and empires, as well as networks of cross-cultural exchange and conquest. Considering the formation and expansion of these large-scale entities, this fourth volume of The Cambridge World History outlines key economic, political, social, cultural, and intellectual developments that occurred across the globe in this period. Leading scholars examine critical transformations in science and technology, economic systems, attitudes towards gender and family, social hierarchies, education, art, and slavery. The second part of the volume focuses on broader processes of change within western and central Eurasia, the Mediterranean, South Asia, Africa, East Asia, Europe, the Americas and Oceania, as well as offering regional studies highlighting specific topics, from trade along the Silk Roads and across the Sahara, to Chaco culture in the US southwest, to Confucianism and the state in East Asia.