Opinion: Finding a New Path to Water Conservation for the Next Millennium, for California and the World

In the long sweep of human history, water has always played a central role in determining the geography of civilizations, and eons ago it influenced the migration of our early ancestors out of Africa and across the world. The ability to manage water contributed to the success or failure of empires along the Tigris and Euphrates rivers of the Middle East, the Indus in southern Asia, and the Yangtze in China. This First Age of water saw the earliest efforts to manipulate water with dams, aqueducts and intentional irrigation, and also the first water laws, institutions and water conflicts.