Unqualified Reservations: Why I am not a libertarian

Unqualified Reservations: Why I am not a libertarian: "If some government is limited by its own volition, it can abandon these limits at any time. (Historical experience suggests that the 'sacred-document' trick is of extremely limited utility in preventing it from doing so.) If the government is limited by some external power, it is not a government in the usual sense of the word, and we should direct our attention to the limiting power."

This, it seems to me, is a fundamental problem with anarcho-capitalism. Some protection agency is going to emerge as the strongest, in which case they can demand the best bargains, and use the threat of force in a way that gives it all the characteristics of government anarchists hate.