there are no democracies.
it's all either republics or oligharchic dictatorships pretending to be republics.
Ancient Greeks like to fight each other and were always seemingly about being the best of the lot, which resulted in eventually them having to succumb to the better (Roman/Etruscan) idea of working together.
but then Rome became a dictatorship which devolved into an Imperium.
I really don't think that there are any democracies at all.