If there be in nature such a principle as justice, it is necessarily the only political principle there ever was, or ever will be. All the other so-c… - Lysander Spooner

Man, no doubt, owes many other moral duties to his fellow men; such as to feed the hungry, clothe the naked, shelter the homeless, care for the sick, protect the defenceless, assist the weak, and enlighten the ignorant. But these are simply moral duties, of which each man must be his own judge, in each particular case, as to whether, and how, and how far, he can, or will, perform them. But of his legal duty—that is, of his duty to live honestly towards his fellow men—his fellow men not only may judge, but, for their own protection, must judge. And, if need be, they may rightfully compel him to perform it. They may do this, acting singly, or in concert. They may do it on the instant, as the necessity arises, or deliberately and systematically, if they prefer to do so, and the exigency will admit of it.

Certainly no man can rightfully be required to join, or support, an association whose protection he does not desire.

The science of mine and thine—the science of justice—is the science of all human rights; of all a man’s rights of person and property; of all his rights to life, liberty, and the pursuit of happiness.