Capitalism is the fullest expression of anarchism, and anarchism is the fullest expression of capitalism. Not only are they compatible, but you can't really have one without the other. True anarchism will be capitalism, and true capitalism will be anarchism

The ingenious slogan that the public debt does not matter because 'we owe it to ourselves' is clearly absurd.

If a man has the right to self-ownership, to the control of his life, then in the real world he must also have the right to sustain his life by grappling with and transforming resources; he must be able to own the ground and the resources on which he stands and which he must use. In short, to sustain his human right.

John Stuart was the quintessence of soft rather than hardcore, a woolly minded man of mush in striking contrast to his steel-edged father.

No one may threaten or commit violence ('aggress') against another man's person or property. Violence may be employed only against the man who commits such violence; that is, only defensively against the aggressive violence of another. In short, no violence may be employed against a non-aggressor. Here is the fundamental rule from which can be deduced the entire corpus of libertarian theory.

...The very nature of interstate war puts innocent civilians into great jeopardy, especially with modern technology.

It is in war that the State really comes into its own: swelling in power, in number, in pride, in absolute dominion over the economy and the society.