Waters that cross international political borders can drive the countries that share them to conflict—or encourage cooperation between them. Indeed, since the 1940s, overall trends point to a tendency for countries to cooperate over shared water resources, which stands in stark contrast to media portrayals of “water wars.”

Yet instances of conflict over water have increased slightly since 2000. Why? Most of them are fueled by water quantity disputes or the unilateral development of dams or other infrastructure. Institutions often play a key role in facilitating cooperation (and reducing conflict) over shared waters, but their growth and adoption have slowed over the last two to three decades.

By 2050, two-thirds of the population will face some form of water stress. As a fundamental part of life, water—or a lack of it—influences other parts of life, including conflict. In fact, as author Marcus King notes in his new book, Weaponizing Water: Water Stress and Islamic Extremist Violence in Africa and the Middle East, there is a “correlation between the spheres of influence of violent extremist organizations (VEOs) and the driest lands or areas of sparse vegetation in some of the most arid regions on earth.”

The first anniversary of Russia’s invasion of Ukraine is also a reminder of the long-term challenges faced by that embattled country, including one of the most important resources for human survival: water.

“For Ukrainians, water has been under fire for nearly a decade,” observed Erika Weinthal, Professor of Environmental Policy and Public Policy at Duke University, at a recent Water @ Wilson Series event: “Water and Conflict: Updates from the Russia-Ukraine War,” co-hosted by the U.S. Water Partnership.

Water sustains life on our planet. And access to clean and safe water is foundational to society. So why has it only been in recent years that water has risen to the top of discussions of climate and security? Richard W. Spinrad, the Under Secretary of Commerce for Oceans and Atmosphere and NOAA Administrator, says that one of the biggest reasons is the major impact that climate-related changes in precipitation like droughts and extreme rainfall are having across the globe: “We’re starting to see things like we’ve never seen before. The nature of storms is changing: We saw five feet of rain fall in Hurricane Harvey. Five feet.”

The Klamath River Dam removal, slated for early 2024, is a significant milestone in the journey towards bringing back healthy rivers in the United States. This action will restore nearly 300 miles of river habitat in the Klamath and its tributaries across Southern Oregon and Northern California, allowing salmon, a critical source of economic and nutritional value for the local communities, to return. As the world’s largest dam removal and river restoration project in history, this project will have lasting impacts on the health of this river and represents an opportunity for building momentum to continue global river protection and restoration.

Is water important in climate policy? It seems obvious. Water has a well-established link as the medium of most negative climate impacts. Yet when it comes to addressing the climate crisis, the answer depends very much on who you ask.

On a crisp autumn morning, the Yellow Hill Community Center in western North Carolina buzzed with excitement as more than 120 Cherokees and their allies shared conversations, laughter, and a hearty breakfast. They had descended upon the center in the Qualla Boundary on October 19, 2022 to mark the second annual Honor Long Man Day in the homelands of the Eastern Band of Cherokee Indians (EBCI).