The paper studies the Iraqi-Syrian-Turkish conflict over the Tigris and Euphrates rivers, from a geopolitical perspective. It argues that this conflict has historical and political roots, not solely tied to the natural availability of water in the Tigris and Euphrates, but rather connected to the policies of different parties in managing water resources. The paper includes three essential elements. The first examines the geographical and hydrological characteristics of the Tigris and Euphrates. The second explores the political and academic discourse in the 1990s regarding the "water war" theory. The third and final element analysed the characteristics of the new conditions that have distinguished the three countries since the beginning of this century, imposing on Syria and Iraq the need to devise a new vision for managing their available water resources. The research concludes with the inevitability of negotiation for the joint management of the Tigris and Euphrates water resources as it is not in Turkey's interest to ignore the interests of downstream countries. Moreover, Syria and Iraq cannot achieve any results without negotiation and water diplomacy.