Post WW2 European Democracy. The colonialism mostly didn't survive the colonizer having all their cities firebombed, often repeatedly. Most of the stolen prosperity burned. Not that every European country actually took part in the Colonialism,

And even then, half of the continent was then ruled by a totalitarian dictator, and were themselves exploited as colonies of Moscow. And the ones that were free lived in somewhat constant fear of being invaded by their somewhat insane neighbor.

But the key is, the people who wrote the post WW2 constitutions, wrote in stuff that made them more solid democracies than had existed before, what with many of them still being monarchies prior to a pair of devastating wars.

Lessons have been learned about the mathematical structure of democracy.

I believe that the true key to communism is extreme democracy. Every man, woman, and yes, child, should have a voice in government, and that voice should matter. And yes, the European Democracies are closest to that goal. Especially with the creation of the EU.

Closest, but nowhere near there yet.