The Pentagon just completed a wargame that involved overt economic warfare between Russia, China and the US. While I applaud the DoD for thinking more broadly, the entire premise is completely flawed. Economic warfare between major economic powers in an integrated world is mutually suicidal (akin to "how can you win a nuclear war?"). The recent financial crisis points to how interlinked we are and how fast a contagion of distrust can spread. No, the real threat of economic collapse is due to an inability to effectively manage a dynamically unstable global economy or overspending on security (due to a failure of strategy). If there is a threat of economic warfare, it is from asymmetric attack by open source enemies (which could make it deniable).