"A natural right to liberty, irrespective of the ability to defend it, exists in nations as much as and no more than it exists in individuals. Had nature meant us to live uncontrolled by any will but our own, we should have been so constructed that the pleasures of one would not interfere with the pleasures of another, or that each of us would discharge by instinct those duties which the welfare of the community requires from all. In a world in which we are made to depend so largely for our well-being on the conduct of our neighbours, and yet are created infinitely unequal in ability and worthiness of character, the superior part has a natural right to govern; the inferior part has a natural right to be governed; and a rude but adequate test of superiority and inferiority is provided in the relative strength of the different orders of human beings."