And it's also interesting to think - how do we measure the results?

How to even evaluate the results of a given system?

Is it median purchasing power parity, per Capita?

Human development index?

Happiness survey scores?

Another issue, and I'm sharing this because I've been thinking about it as well, like what is the best system.

To what extent, if we look at results, can we attribute them to the system (rule of law, freedom, no violence, no corruption) vs other things (natural resources, history, dominant culture and values, better weapons (...)

I don't have the answer. It is probably nuanced.