One essential of a free government is that it rest wholly on voluntary support. And one certain proof that a government is not free, is that it coerces more or less persons to support it, against their will.
All, or nearly all, the advantage there is in fixing any constitutional limits to the power of a government, is simply to give notice to the government of the point at which it will meet with resistance.
The number who actually consented to the Constitution of the United States, at the first, was very small. Considered as the act of the whole people, the adoption of the Constitution was the merest farce and imposture, binding upon nobody.
All governments, the worst on earth, and the most tyrannical on earth, are free governments to that portion of the people who voluntarily support them.
The right and the physical power of the people to resist injustice, are really the only securities that any people ever can have for their liberties. Practically no government knows any limit to its power but the endurance of the people.
Slavery, if it can be legalized at all, can be legalized only by positive legislation. Natural law gives it no aid. Custom imparts to it no legal sanction.