A bipartisan group of defense experts and former military leaders are calling on the next administration to consider climate change as a grave threat to national security.

Rivers have shaped the Western Balkan Peninsula’s characteristic landscape and played an important role in its history. Following the violence of the Yugoslav secession wars in the 1990s and the creation of six new nations, the number of transboundary river basins doubled from 6 to 13. In Kosovo, where independence remains a question, the water sector is a microcosm of tensions between ethnic Serbs and Albanians. The challenge of water resource management exists not only over the province’s contested national boundaries with Serbia, but between divided ethnic groups within the territory.

In June 2010, The New York Times published a front page story trumpeting a Pentagon announcement of roughly $1 trillion worth of mineral resources in Afghanistan. Officials said the discovery was “far beyond any previously known reserves and enough to fundamentally alter the Afghan economy and perhaps the Afghan war itself.” Then-President Hamid Karzai soon inflated the figure to $3 trillion and then again to $30 trillion, enough to transform the country into the “Saudi Arabia of lithium.”

Conflict is typically viewed as a failure of social and political systems and almost never as a method of transforming dysfunctional or fractured societies into cohesive units. However, in an analysis of the discourse around climate change and conflict in Local Environment, Melissa Nursey-Bray concludes that conflict is a sometimes-necessary step in a complicated process to create stable societies. Nursey-Bray separates the climate-conflict discourse into two baskets: climate change as a security risk and climate change as one of many factors that contribute to insecurity.

In the mountains of northern Afghanistan, between Pakistan and China, a region that has historically rejected the Taliban has become the group’s second-largest source of revenue. The twisting tale of Kuran wa Munjan reveals the challenges of extracting precious minerals in unstable and fragile states.

The Nile River is shared by 11 countries, for which it is vital for food and energy production, freshwater, and as a means of transportation. Sharing the resources of the Nile has, however, been politically difficult. Recently, the construction of the Grand Ethiopian Renaissance Dam has caused a major dispute with downstream Egypt which fears the dam will affect water flow in its own territory.

Earlier this month, armed clashes between competing factions of South Sudan’s government broke out in the capital Juba, a day after the nation’s fifth anniversary of its independence. The conflict dates back to political events and factional fighting that first emerged in 2013.

It might seem strange to say that the deep sea, the vast expanse of the world’s oceans beyond the continental shelf, is at risk of conflict and competition. After all, no one lives there, and as is often said, more is known about the surface of the moon than most parts of the ocean floor. But the fact is, even the cold, dark reaches of the ocean are no longer immune to resource competition between the world’s major powers.