American libertarians are behind the times when it comes to foreign policy (also known as “international relations”). We’re still, to a large extent, stuck in a Cold War mentality. The non-interventionism of Murray Rothbard and Robert Higgs is still prevalent in our circles, but this non-interventionism is rooted in the bipolar power struggle between the United States and the Soviet Union; it’s concerned with imperial overreach rather than liberty and republican security, which is understandable given the America’s role in the Cold War (the reactionary opposite to the Soviet penchant for exporting revolution).
European classical liberals are ahead of us, as they are in a more multipolar environment than us Americans, but they’re missing something too. They think the Westphalian status quo is just fine. They point to the European Union and they say, it’s better than nothing. But the world has changed since Westphalian confederations were en vogue. How does Westphalian nation-statism answer puzzles like Somaliland or Biafra or Balochistan?
American libertarians and European classical liberals have built their exit-centric approach to international relations upon Westphalian assumptions.