Homeostasis of Human Society
So I was thinking about Russia, right, and between Imperial Russia, the Soviet Union, and modern Capitalist 'Democracy' Russia, you have three wildly different governmental structures and ideologies, but somehow they all seem more like each other than they do like anything else, implying some kind of homeostatic mechanism that keeps a society more or less in equilibrium even as you poke at it, for better or worse.
In 1917 the United States hadn't even had a fraction of the power they had after WW2. And while Western countries certainly weren't friendly towards Bolshevik, it's hard to imagine anyone being friendly towards a country that starts with an armed putsch and Red Terror, and then promises everyone else in the world the same, and then for decades actually incites "revolutionary terrorism" in neighbour countries and everywhere else.