that's libertarianism's fatal flaw: you can't escape force and power (that is to say, politics) in any kind of society, let alone in a political system.

most of libertarianism is trying to cope with this core flaw, not living that glorious individualist life.

liberty as one of many (sometimes contradictory) values (and the academic lines of inquiry therein) is fine. a whole ideology based on the supremacy of that one value is simply unworkable. we're social creatures, not just a collection of coincident individuals.