In his 1927 book Liberalism, the radical classical liberal and economist Ludwig von Mises took a strict and expansive view in favor of secession. Specifically, he noted that respect for the right of self-determination required extant states to allow the separation of new polities seeking secession. He writes:

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Some modern opponents of a right to secession or self-determination invent a variety of reasons why secession was acceptable for Americans in the 1770s, but not in the 1860s. For example, historian Brooks Simpson in this column splits many hairs attempting to explain (unconvincingly) that the Declaration of Independence had nothing to do with secession.

Breaking up with a person you have known for more than thirty years, with whom you have participated in countless conferences and co-authored a couple of articles, even if only in the somewhat distant past, is nothing done lightly. It is even harder, if one shares with this person a common standing as a public intellectual and both our names are mentioned frequently in one breath as prominent students of the same teacher, Murray N. Rothbard, and as leading intellectual lights of the modern libertarian movement founded by Rothbard.