In strict logic, libertarian political doctrine can be severed from all other considerations; logically one can be – and indeed most libertarians in fact are: hedonists, libertines, immoralists, militant enemies of religion in general and Christianity in particular – and still be consistent adherents of libertarian politics. In fact, in strict logic, one can be a consistent devotee of property rights politically and be a moocher, a scamster, and a petty crook and racketeer in practice, as all too many libertarians turn out to be. Strictly logically, one can do these things, but psychologically, sociologically, and in practice, it simply doesn't work that way." [my emphasis, HHH]
Let me begin with a few remarks on libertarianism as a pure deductive theory.
If there were no scarcity in the world, human conflicts would be impossible. Interpersonal conflicts are always and everywhere conflicts concerning scarce things. I want to do X with a given thing and you want to do Y with the same thing.