This one is from the Foresight's:

The decline of world trade will remove a powerful source of common interest in a stable world order, precisely at the same time that populations idled from productive work will be asking what they have to look forward to in the future, and precisely at the time that large-scale expansion into disputable territory becomes possible. Some nations will want equitable division of the "common heritage of mankind," others will argue that it's first-come first-served, and may stake their claims in military hardware. This is the one issue most likely to generate serious dissension and hostility even between democracies, erstwhile friends and allies, while providing an overt rationale for deploying competitive military forces.

My previous post on the legal concept of CHM can be found here.