Want to Secede? First, Take This Test

How libertarians can separate some independence movements from others.

Dawn in Catalonia isn't so clear.

Credit: MafrMcfca/Getty Images
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As the issue of Catalonian secession comes to the fore once again, and with America’s celebration of its independence immediately behind us, it is worth pondering when secession makes sense as a political principle. Many observers judge particular cases of potential secession in terms of their cultural loyalties: The typical American, for instance, favors the War of Independence, but would be upset if a current state wanted to leave the Union.

So what more general principles might govern when secession is a good idea?