Competition over the Nile watercourse is becoming a global crisis. As population growth, economic development, and urbanization increase the demand for water in the Nile Basin while climate change threatens its supply, the region faces a looming water crisis. An effective resolution of this multifaceted issue, which impacts 11 African countries, requires detailed multidisciplinary research. Until now the academic discourse regarding the Nile watercourse has been primarily dominated by monodisciplinary studies. This book fills that gap, providing a retrospective and prospective look at the Nile through multidisciplinary lenses—commingling history, hydro-politics, climate change, and law. It scrutinizes the legal and hydro-political trajectories of the Nile Basin, from the 4th century A.D. to 2022.