Environment & Climate Change

Climate disasters shape the trajectory of internal conflicts in states highly vulnerable to changes in conflict dynamics. Conflict after a climate disaster escalates when the disaster induces shifts in relative power that enable one side to increase its military efforts. But when one actor is weakened by the disaster and the other lacks the capability to exploit that weakness, conflict intensity declines.

At one point in human history, water’s importance in war went beyond bearing convoys, hiding submarines, and slaking soldiers’ thirst. Water was often itself a weapon. In areas where it was scarce, armies took action to make it scarcer to force besieged enemy cities to capitulate, and in areas where it was abundant, combatants destroyed dams and watched the resulting floods carry their adversaries away. Today, however, most combatants recoil at the use of water as a weapon, and only the most depraved deploy it.

Since the end of World War II, nation-states in international conflict have made concerted efforts to restrain the weaponization of water. Distinct from realist and rationalist explanations, the historical record reveals the rise of an international normative inhibition—a “water taboo”—on using water as a weapon.

Harvard Kennedy School’s Belfer Center for Science and International Affairs hosted Secretary of State John Kerry on Tuesday, October 13, for a discussion of diplomacy and challenges in key hotspots around the globe.

In a one-on-one discussion with Secretary Kerry, Belfer Center Director Graham Allison asked Kerry about his concerns and plans related to Iran, Syria, Russia, and the Islamic State, among others. The overflow event in the Charles Hotel ballroom included questions from the audience of more than 500 Harvard students and faculty.

Included here is the complete U.S. Department of State transcript from the event. The video is included with the original transcript.