A society of libertarians is not an oxymoron. Libertarians aren't loners; in fact we're usually even more socially oriented than socialists. What we are is individualists; meaning that all relations between individuals should be voluntary. Socialists think that it's acceptable for some relations to happen at the point of a gun. Note that someone may hold individualist and socialist ideas; while they may think of themselves as pragmatic, compromising towards a worthy goal; instead they're just confused. You can't compromise on a principle, otherwise you lose it entirely. For example, it's wrong to kill; thus it's wrong for a group to kill; thus it's wrong for a government to kill; thus capital punishment is wrong. At best it's a cheaper method of life imprisonment -- but when you compromise your principles to save money, you are not principled at all.