5000 years ago there began a momentous revolution which shapes our lives even today. City civilization appeared for the first time in Mesopotamia (now Iraq), followed by Egypt, India, China and the Americas. In each of these regions civilization developed independently, and each had its own distinct vision - very different from the values of the modern Western world - which are now seen as a yardstick of growth, politics and morality. But the ideals of these ancient civilizations still influence the majority of the world's population. Based on the author's Central TV series, this book explores these ancient cultures, seeking their essential character and their continuing legacy. Michael Wood's other books include "In Search of the Dark Ages" and "A Search for the Roots of England".