"Based on the podcast with over one hundred million downloads, Fall of Civilizations ... explores how a range of ancient societies rose to power and sophistication, and how they tipped over into collapse. Across the centuries, we journey from the great empires of Mesopotamia to those of Khmer and Vijayanagara in Asia and Songhai in West Africa; from Byzantium to the Maya, Inca, and Aztecs of Central America; from Roman Britain to Rapa Nui. With ......