I have a theory.
I think the nonwestern world poverty is caused by internationalism. It's caused by the whole world setting one culture as the universal standard of everything. You see, the whitest country has the least crime rates. Meanwhile the most nonwhite country doesn't have few crime rates as well ? It's not merely homogeneity/heterogeneity anymore. It's not racial. Genetics don't determine violence/imbalance. It's the whole world catching up to the west. The multicultural west also have high crime rates, why, because of the nonwhites trying to keep up with the white standard. Indonesia is homogeneous, but we also have high crime rates. Because we're all catching up to western standard of living. If only everyone was isolated from each other and lived based on the system that they created themselves, everyone would be equally having low crime rates. The exposure to western culture did all of this.
Think about it.