Frederic Bastiat, from Selected Essays on Political Economy, published 1848.

If each man has the right to defend, even by force, his person, his liberty, and his property, several men have the right to get together, come to an understanding, and organize a collective force to provide regularly for this defense.

Collective right, then, has its principle, its raison d’être, its legitimate basis, in individual right; and the collective force can rationally have no other end, no other function, than that of the individual forces for which it substitutes.

Thus, as an individual cannot legitimately use force against the person, liberty, or property of another individual, for the same reason collective force cannot legitimately be applied to destroy the person, liberty, and property of individuals or classes.

Any readers who would like a further understanding of the roots of libertarianism, I highly suggest reading the whole thing. It’s fairly long, but you’ll be better for it.