Cape Town is running dry. But thanks to its sophisticated water management efforts, the city may ride out the crisis. However, other cities that lack these capacities are less likely to survive Day Zero. Especially in developing countries, where urban water services are often provided by informal or illegal actors, running out of water could have dangerous ripple effects for peace and security.

After pirates hijacked an Iranian fishing vessel last year near Bosasso, a major seaport in Puntland, Somalia, local authorities observed that the offending boat was casting nets without a license. While piracy has diminished since 2008-2012, when these waters became some of the most lawless in the world, a spate of incidents in 2017-8 has made it clear that the conditions that led to piracy—including incursions from foreign fishing boats—are still a major problem.

“Most fundamentally, we turned the ‘resource scarcity drives conflict’ argument on its head and asked, ‘Can environmental interdependence drive cooperation in ways that can be harnessed to build trust and contribute to conflict prevention and peacebuilding?’” said Geoff Dabelko, Associate Dean at Ohio University’s Voinovich School of Leadership and Public Affairs, about Environmental Peacemaking, which was one of the first books to investigate these questions. In the 15 years since he and Ken Conca, a professor at American University’s School of International Service, published their edited volume, the idea that shared environmental issues could be used to build peace has become a focus of innovative research, policy, and programs.

A recent article in Nature Climate Change has spurred a new chapter in the lively scholarly debate over the potential relationship between climate change and violent conflict. We agree with the article’s authors that there are several forms of sampling bias in this field, including how regions are selected for analysis. But simply addressing this sampling bias will not resolve many of the academic controversies that have raged since the mid-2000s. Our recently published study in International Studies Review examines the mechanisms connecting climate change or its consequences to violent conflict and concludes that to move this research agenda forward, researchers must pay deeper attention to the “nuts and bolts” that shape both climate-related conflicts and our understanding of them.

In 2017, four environmental activists were murdered every week on average—most of them in Latin America, and most of them targeted for protesting industries like logging or mining. These shocking numbers may finally start to taper off, if three new initiatives launched just this month are successful at protecting people’s right to a clean environment—and its defenders.

Recently, Nature Climate Change published a new study demonstrating significant sampling bias in the research that informs our understanding of whether climate change will accelerate human conflict. I was a peer reviewer of “Sampling bias in climate–conflict research,” and I wrote an accompanying “News and Views” piece summarizing it. I am fascinated by the issue of sampling bias; it’s perhaps the most consequential and least recognized form of bias in the social sciences, with potentially massive consequences for what we (think we) know about a host of phenomenon.

“The demand for water will not be linear,” said Vice Admiral Lee Gunn (USN-Ret,), currently vice chairman of the CNA Military Advisory Board, at a recent Wilson Center event on water and security. As people’s quality of life improves, “the demand for water will increase as well. And so the stresses that we already see around the world—the arguments over basin rights for water, the depletion of water in major cities around the world—we think will aggravate problems that already are beginning to manifest themselves,” he said.

Over the past decade, we have seen a resurgence of civil conflicts in Africa, the Middle East, and southeast Asia, as weak states are increasingly threatened by non-state actors, such as organized crime groups, terrorist organizations, and insurgents. These wars endanger millions of people—including some of the world’s most at-risk populations—by exposing them not only to violence, but also displacement, environmental degradation, and economic destruction. To effectively protect them, leaders and policymakers need to be able to predict exactly where, when, and how insurgent violence will break out and spread.