As Andrew Sullivan notes, Glenn Reynolds no longer even claims to be a libertarian, and his repudiation of this former position is shared by a number of leading shmibertarians, who are now happy enough to identify as orthodox Republicans. I haven’t yet seen anything similar from some others, such as the Volokhs, but the idea that a relaxed attitude to sex and drugs, and support for economic policies that favour your own social class, can trump the authoritarian implications of militarism, from Gitmo to collusion in government lies, is now pretty much dead. Insofar as an idea can be tested by experiment, prowar libertarianism has been tried and failed (a bit more on this from Jim Henley)
The implications go further I think. Given that the Republicans are now definitively the war party (not that the Democrats have yet become the peace party, but that’s another story), it’s hard to see how libertarian Republicans can survive, any more than Dixiecrats survived Nixon’s Southern strategy. The recent decision by RedState to ban Ron Paul supporters is a pretty clear indication of how real Republicans think about this. This has big implications for a thinktank like Cato, which has opposed the war (but very sotto voce – a visitor to their website would be hard pressed to tell that there even was a war) while remaining within the Republican tent.
Of course, it goes the other way. It’s hard to witness the catastrophic government failure that has characterized every aspect of this war without becoming more sympathetic to certain kinds of libertarian (and also classically conservative) arguments, particularly those focusing on the fallibility of planning.
fn1. Apparently my ignorance of the further reaches of US party politics may have led me to overstate Reynolds’ candor. What’s being announced is, apparently, a break with the Libertarian Party, leaving him free to label himself a (small-l) libertarian. Thanks to Kevin Drum for pointing this out. Jim Henley, linked above, also commented on this distinction, concluding “I doubt it matters. In a corrupt political discourse, no label is much use.” and that’s about where I stand.