The world has plenty of reasons to avoid conflict already. Yet attendees at the recently-concluded COP27 climate conference in Sharm el-Sheikh, Egypt were presented with another compelling argument: Warfare is bad for global warming. So much so, in fact, that Ukraine’s delegation to the conference organized a special session at the conference of parties on “War Related Emissions,” bringing along a tree trunk bearing scars from Russian shell fragments as tangible evidence.

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.

As climate change is increasingly recognized as a security issue, a parallel understanding is also developing. Traditional categories and approaches may not be the optimal way to address the threats posed by climate impacts.

The nation states and international institutions at the center of security discussions now are shifting their approach. For instance, the U.S. has affirmed and moved to institutionalize its commitment to address the national security implications of climate change under the Biden Administration. In doing so, it is joining an increasing number of other nation-states (the UK, France, Sweden, Germany and New Zealand) that have also developed institutional arrangements and plans for their national response to climate insecurity.

There’s a scene near the climax of Agatha Christie’s Murder on the Orient Express when Hercule Poirot starts to plot out the possible murderers. There’s Colonel Arbuthnot, who had opportunity and motive. There’s Mr. McQueen, suspicious in his transparent attempts to misdirect the detective. There’s even the haughty, toad-faced Princess Dragomiroff. Like practically everyone on the train, she had good reason to wish the evil Ratchett dead.

Every year, more than two billion farmers around the world work the land day in and day out to earn a living and produce what is needed to feed and clothe an ever-growing global population that reached 8 billion in November 2022. Though they bear the brunt of climate change on the front lines, many of the world’s farmers, ranchers and fishers are unaware of the international processes that affect their livelihoods.