Clips

You can say it's worse in former colonies, but resentment is always a feature. Group conflict is always on the table once the opportunity arises, and the only societies which seem spared have a confident supermajority making any attempt not feasible. Ethnocentric cooperation wins out

There will always be something. Especially since all nations have a mean past. Even Sweden. It participated in colonial activities by supporting them economically (like selling iron). And history cant be changed.

Mexico thinks they arent wealthy because we stole SoCal from them.

https://www.amazon.com/World-Fire-Exporting-Democracy-Instability/dp/0385721862

And the theory that once the supermajority fades, people can take what they want via identitarian politicking is well evidenced in our current diversity (and there's always incentive to pander to these things, either from marxist academics or from politicians) and in the pattern of ethnic conflict worldwide. It certainly has more support than wishful thinking that if you just get the institutions, history, and incentives right (which you wont, they'll be the product of human fallibility and compromise) you can lastingly thwart them. That's utopian, to think institutions arent molded by their polity far more swiftly than the reverse