This is why although I've said I lean heavily towards Libertarianism (because in reality I'm more aligned with Lockean Liberalism which could be confused with Libertarianism); I'm really more of a Militarist Minarchist.

A moral, educated, and homogenous population isn't enough. You need complete armamentation, and a marshal society. Really, even outside of Liberal philosophy, the only societies that ever respected individual rights and liberties were societies where the population was trained, equipped, and on-call for military service. Effectively, such societies had governments that accepted that autocracy couldn't work, and that they could quickly end up being executed by the general population that was also their army. As such, it made a hell of a lot more sense to betray no one, and keep the soldiering population happy with reasonable governance. State craft was also better because it meant that the political leadership was also the officer corps and only got that way through trust from subordinates, agreeableness with higher-ups, and competence of command. Before America, we only ever really saw this in England, Switzerland, and the Sikh Confederation.

If everyone is capable of serving with one another in a military capacity, you've just achieved the morality, education, and homogeneity that you're looking for; but now you can actually use it.