Brian Doherty writes:
"States, after all, cannot function without first aggressing against someone, if only to get tax money to fund their activities."
It's amazing to me that libertarians can make such statements as if they were obviously true or uncontroversial, and something with which their opponents already agree. "So, you see," they will continue, "you are in favor of some forms of aggression!"
But this argument is entirely circular as it is typically formed: The State is illegitimate because it engages in aggression, and we can say it must engage in aggression because its collection of taxes is illegitimate -- but, of course, since the collection of taxes is how the State survives, to say their collection is illegitimate is to just re-state that the State is illegitimate. Thus, the argument runs, "The State is illegitimate because the State is illegitimate."
Or, to put it differently, if the State is legitimate, then so is its collection of taxes, and therefore collecting them is not an act of aggression. (In that case, in fact, it would be withholding of taxes due that would be theft!)