Libertarianism is an assertion without a philosophy. You can't really define it. Usually it is synonomous with the non-aggression principle, but as you can see,

Libertarianism is an assertion without a philosophy. You can't really define it. Usually it is synonomous with the non-aggression principle, but as you can see, oftentimes, even that is not the case. There is an actual philosophy which defends individual freedom from aggression. Objectivism. About 5% of the whole philosophy deals with these kinds of issues.