The reason for war will not be foreign policy. Writing a short post for The Week, William Falk sums it up well:
Wage stagnation — and the resulting erosion of the middle class — is this country's biggest problem. When hard work no longer produces upward mobility for workers who lack elite skills, America's implicit promise is broken. At National Review, conservative Maggie Gallagher complains that "for more than a decade Americans have been losing ground financially, and the GOP has yet to address the issue." In The Washington Post, liberal Harold Meyerson grouses that "the Democrats have had precious little to say about how to re-create…widely shared prosperity." Perhaps that's because the standard liberal and conservative nostrums (Tax the rich! Eliminate regulations!) won't address the fundamental problem: Globalization and technology have devalued both labor and workers, and made companies more ruthlessly competitive. Here's a scary thought: Neither party is offering a remedy because there isn't one.When hard work produces disillusionment not advancement, governments will distract the populace with foreign adventures. Given that nations' economies are becoming entwined in a Gordian Knot, the distraction will be monstrous.