There's enough percentage of people who would sacrifice the long term for short term comforts, especially in an anarchy situation, that you'd spend a lot of energy on self defense.
But I think there is an IQ issue which limits abstract thinking (ie planning for the future & what-if scenarios eg what if I need food in the future).
Hard to account for upbringing of people in all these places. If you wanted to prove such a relationship you'd have to see if it holds for kids of races raised in foreign places.