A classic from Murray Rothbard.
The libertarian movement has been chided by William F. Buckley, Jr., for failing to use its “strategic intelligence” in facing the major problems of our time. We have, indeed, been too often prone to “pursue our busy little seminars on whether or not to demunicipalize the garbage collectors” (as Buckley has contemptuously written), while ignoring and failing to apply libertarian theory to the most vital problem of our time: war and peace. There is a sense in which libertarians have been utopian rather than strategic in their thinking, with a tendency to divorce the ideal system which we envisage from the realities of the world in which we live.
In short, too many of us have divorced theory from practice, and have then been content to hold the pure libertarian society as an abstract ideal for some remotely future time, while in the concrete world of today we follow unthinkingly the orthodox “conservative” line. To live liberty, to begin the hard but essential strategic struggle of changing the unsatisfactory world of today in the direction of our ideals, we must realize and demonstrate to the world that libertarian theory can be brought sharply to bear upon all of the world’s crucial problems. By coming to grips with these problems, we can demonstrate that libertarianism is not just a beautiful ideal somewhere on cloud nine, but a tough-minded body of truths that enables us to take our stand and to cope with the whole host of issues of our day.
Let us then, by all means, use our strategic intelligence – although, when he sees the result, Mr. Buckley might well wish that we had stayed in the realm of garbage collection. Let us construct a libertarian theory of war and peace.
The fundamental axiom of libertarian theory is that 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 nonaggressor. Here is the fundamental rule from which can be deduced the entire corpus of libertarian theory.
Let us set aside the more complex problem of the State for a while and consider simply relations between “private” individuals. Jones finds that he or his property is being invaded, aggressed against, by Smith. It is legitimate for Jones, as we have seen, to repel this invasion by defensive violence of his own. But now we come to a more knotty question: Is it within the right of Jones to commit violence against innocent third parties as a corollary to his legitimate defense against Smith? To the libertarian, the answer must be clearly no.