It is true that the theory of our Constitution is, that all taxes are paid voluntarily; that our government is a mutual insurance company, voluntarily entered into by the people with each other; that each man makes a free and purely voluntary contract with all others who are parties to the Constitution, to pay so much money for so much protection, the same as he does with any other insurance company; and that he is just as free not to be protected, and not to pay any tax, as he is to pay a tax, and be protected.
Lysander Spooner, No Treason (1867–1870), No. VI: The Constitution of No Authority (1870), pp. 12–13.