One could also have equally

One could also have equally argued in 1700 that because chattel slavery had always existed, and because no non-slavery-condoning society had ever existed up to that point, that such a thing was "impossible" and "against human nature".  Yet here we are."My brand of libertarianism" has not spontaneously popped up everywhere partly, and precisely, for the reason you gave: because of the existence of sociopaths, and due to the almost ubiquitous social and intellectual apathy down through the ages that has tolerated, condoned and even advocated coercive rule by thugs and the institutionalization of violence, a.k.a. government, as right and proper.  Only when enough people are willing to accept that this is NOT the natural order of things, and that humans can do much better than that, will we witness the social evolution and revolution that will make true liberty possible.  I do not say it is a guaranteed thing, but I have my hopes that it will come, although almost certainly not in my lifetime or yours.