In the 20th century, the story of European imperial holdings was a story (mostly) of communism.
Do you think Winston Churchill anticipated this? Rudyard Kipling? Any of the other enthusiastic imperialists of the 19th century? They may have seen themselves as defenders of a very different kind of order.
Yet nonetheless in promoting imperialism (bad) the European imperialists created militarized, policed cultures. They created egregious inequalities of authority and status. They created societies more dependent on the state. And of course, they created people resentful at rule from afar.
Is it any wonder with all of these factors considered that the “dominoes” in the former European holdings fell so fast?
The Europeans created the emotional hatred of Westernness and (and therefore anything associated to it that any actual good contributions of Europe were threatened.
The monster they tolerated (imperialism) directly bred the (worse) national socialism/communism that took over throughout South America, Africa, and Asia.
What if the European empires had ended their colonial rules 50 or 100 years earlier? All other things being equal, it’s hard to believe that communism would have swept Africa, Asia, and South America as it did. And it’s possible the countries of the West would not have ended up at the gunpoint of countries which they once held at gunpoint.
It happened slowly, then all at once, but the imperialism that Europe tolerated in its own codes of values led to the communism which the Churchills and Kiplings would never have embraced.
What monsters do you tolerate? They may not torture you as they torture people around you. But they will breed. And the offspring of the evils you tolerate in yourself may become a clear danger to you, too.