Edwin’s post giving one cheer to NATO brings up the old rift between European and American libertarians on foreign policy and military alliances. As usual, it’s excellent and thought-provoking. Here’s what he got out of me:

International relations splits the classical liberal/libertarian movement for a few reasons. First, consensus-building on both sides of the pond is different, and this contributes strongly to the divide over foreign policy. American libertarians lean isolationist because it aligns closer to the American left and libertarians are desperate to have some sort of common ground with American leftists. In Europe, leftists are much less liberal than American leftists (they’re socialists and communists, whereas in the States leftists are more like Millian liberals), and therefore European libertarians try to find different common ground with leftist factions. Exporting the Revolution just doesn’t do it for Europe’s libertarians.

Edwin (and Barry) have done a good job convincing me that trans-Atlantic military ties are worth the effort. But we’re still stuck at a point where the US pays too much and the Europeans do too little. Trans-Atlantic ties are deep militarily, culturally, and economically. Tariff rates between the United States and Western Europe are miniscule, and the massive military exercise put on by NATO’s heavyweights highlights well the intricate defense connections between both sides of the pond. Night clubs in Paris, London, Warsaw, and Los Angeles all play the same Kendrick Lamar songs, too.

Politically, though, the Western world is not connected enough. Sure, there are plenty of international organizations that bureaucrats on both sides of the pond are able to work in, but bureaucracy is only one aspect of getting more politically intertwined with each other (and it’s a damn poor method, too).

In 1966 economists Mancur Olson and Richard Zeckhauser wrote an article for the RAND Corporation showing that there were two ways to make NATO a more equitable military alliance: 1) greater unification or 2) sharing costs on a percentage basis. The article, titled “An Economic Theory of Alliances,” has been influential. Yet almost all of the focus since it was published over 50 years ago has been on door number 2, sharing costs on a percentage basis. Thus, you have Obama and Trump bemoaning the inability of Europe’s NATO members to meet their percentage threshold that had been agreed upon with a handshake at some sort of bureaucratic summit. You have Bush II and Clinton gently reminding Europe’s NATO members of the need to contribute more to defense spending. You have Nixon and Carter prodding Europe’s NATO members to meet an agreed-upon 3-4 percent threshold. For half a century policymakers on both sides of the Atlantic have tried to make NATO more equitable by sharing costs on a percentage basis, and it has never panned out. Ever. Sure, there have been some exceptions in some years, but that’s not okay.

What has largely been lost in the Olson & Zeckhauser article is the “greater unification” approach, probably because this is the much tougher path to take towards equitable relations. The two economists spell out what they mean by “greater unification”: replacing the alliance with a union, or federation. I’m all for this option. It would make things much more equitable and, if the Europeans simply joined the American federation, it would give hundreds of millions of people more individual freedom thanks to the compound republic the Americans have built. Edwin, along with most other European libertarians/classical liberals, acknowledges that Europe is free-riding, but are Europe’s liberals willing to cede some aspects of their country’s sovereignty in order to make the alliance more equitable? Are they ready to vote alongside Americans for an executive? Are they ready to send Senators and Representatives to Washington? Or are they just pandering to their American libertarian friends, and telling them what they want to hear so they’ll shut the hell up about being ripped off?