Sure, you turn my home into a warzone and I have to flee, plus I may buy into your propaganda of a better life, so surely that's a good indication of... what? Developed vs. developing?

I'd perhaps call that cynicism.

Good governance helps a lot even if you had previously suffered invasion, we’re occupied or were a colony: see Taiwan (invaded, occupied), Panama (invaded), USA (colony and invaded subsequently).

It’s doable but people will have to want it. It doesn’t come free and it doesn’t come by listening to charlatans like Marx and his peddlers who promise utopia at no cost but the overthrow of the bourgeoisie. From then on it should be all roses in a land of milk and honey. No, sorry, it takes lots of work, delayed gratification and multi-generational effort to get to a good place like Singapore did or even Chile relatively speaking. You need someone with strong singular vision a a populace willing to follow it through. Why even Salvador after decades of civil war is able to overcome its difficulties and now enjoy great personal safety -the best in the western hemisphere. A country doesn’t have to stay stuck in a bad place.