Rivers are the settings of the formation of civilizations, national identity orders and war conflicts; they are flowing spaces of memory, places of longing, and highly frequented trade routes. They function as “natural” borders between states and connect them at the same time, which is why they have always been used as migration and refugee routes. As such, the world’s rivers are important geopolitical spaces. The currently renewed disputes between the riparian states of Sudan, Egypt, and Ethiopia over the Nile and its water resources, in which economic interests, colonial legacies, but also the challenges of climate change converge, are just one of many examples of the political pressure to which rivers are exposed. In the summer semester of 2022, the Mosse Lectures are dedicated to the "World in River, world in Flux". On May 19, 2022, historian, geologist, and documentary filmmaker Terje Tvedt will give a lecture about the Nile, a river that remains highly contested in terms of geopolitics and hydropolitics. Ethnographer Tahani Nadim will respond to the Lecture.