Defense experts are starting to realize or understand the links between environmental degradation, poverty, and war. Climate change, desertification, and access too potable water are certainly major themes that give rise to conflicts. Here is an interesting excerpt from the Washington Post:

Defense experts have also started to see the link between climate change and conflict. A 2007 CNA Corp. report, supervised by a dozen retired admirals and generals, warned that climate change could lead to political unrest in numerous badly hit countries, then perhaps to outright bloodshed and battle. One key factor that could stoke these tensions is massive migration as people flee increasingly uninhabitable areas, which would lead to border tensions, greater demands for rescue and evacuation services and disputes over essential resources. With these threats looming, the U.N. Security Council held a precedent-setting debate on climate change in April 2007 — explicitly casting global warming as a national security issue.

Global warming could lead to warfare in three different ways.

The first is conflict arising from scarcity. As the world gets hotter and drier, glaciers will melt, and the amount of arable land will shrink. In turn, fresh water, plants, crops and cattle and other domestic animals will be harder to come by, thereby spurring competition and conflict over what’s left. In extreme examples, a truly desiccated ecosystem could mean a complete evacuation of a hard-hit region. And the more people move, the more they will jostle with their new neighbors.

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The second cause of the coming climate wars is the flip side of scarcity: the problems of an increase in abundance. Suppose that global warming makes a precious resource easier to get at — say, rising temperatures in northern Canada, Alaska and Siberia make it easier to get at oil and gas resources in regions that had previously been too bone-chilling to tap. (A few degrees of change in temperature can transform a previously inhospitable climate.) But what happens if some tempting new field pops up in international waters contested by two great powers? Or if smaller countries with murky borders start arguing over newly arable land?

Finally, we should also worry about new conflicts over issues of sovereignty that we didn’t need to deal with in our older, colder world. Consider the Northwest Passage, which is turning into an ice-free corridor from Europe to Asia during the summer months. Canada claims some portions of the route as its own sovereign waters, while the United States argues that these sections lie within international waters. Admittedly, it’d take a lot of tension for this to turn into a military conflict, but anyone convinced that the United States and Canada could never come to blows has forgotten the War of 1812. And not all this sort of resource conflict will occur between friendly countries.

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