If 1:1000 people in a population are shit, they can still build a great deal of social trust. If 1:100 (or 3:10 where you put it, though it's probably more like 1:5) are shit, trust is going to be much more difficult to build and maintain. Further, any non-homogeneous society experiences faction, though that can be compensated for if they're ethnically very similar and assimilate over time.
interracial
intraracial
For the second part, I'd say lets stay away from Jews for now, since those practices aren't technically criminal, there aren't good sources of statistical information, and all we can do is look at incomplete secondary information that just correlates to their occupation and compensation.
I said it can be compensated for, not that it's natural. Aristotle observed the problem with ethnicity and faction over two millennia ago. Having very different haplogroups exacerbates what was already an issue between similar haplogroups.
Behavioral genetics aren't quantified very well, because we don't fully understand what genes contributes to behaviors, what epigenetic factors manifest them, and frankly, an academic fear of what my be found. MAOA is a bit unique, in that it's mechanical function of the MAO-A enzyme would ostensibly explain some of the observations.
I'd like to find the full paper on this again, but it seems to have been paywalled everywhere I look.
Distributions of low functioning variants vary greatly between "races", though most studies are on African American's, not Africans. It's prevalence is far less among American Caucasians, though. It's so rare in Asian populations, a large enough sample can't be found to study it.
That's just one area of genetic behavioral difference though. We're slowly learning of the genes that play key roles in IQ, but we're still a ways off.
If 1:1000 people in a population are shit, they can still build a great deal of social trust. If 1:100 (or 3:10 where you put it, though it's probably more like 1:5) are shit, trust is going to be much more difficult to build and maintain. Further, any non-homogeneous society experiences faction, though that can be compensated for if they're ethnically very similar and assimilate over time.
intraracial
For the second part, I'd say lets stay away from Jews for now, since those practices aren't technically criminal, there aren't good sources of statistical information, and all we can do is look at incomplete secondary information that just correlates to their occupation and compensation.
I said it can be compensated for, not that it's natural. Aristotle observed the problem with ethnicity and faction over two millennia ago. Having very different haplogroups exacerbates what was already an issue between similar haplogroups.
Unfortunately, it's getting harder to find research papers free on the web.
https://www.gwern.net/docs/genetics/heritable/2013-beaver.pdf
Behavioral genetics aren't quantified very well, because we don't fully understand what genes contributes to behaviors, what epigenetic factors manifest them, and frankly, an academic fear of what my be found. MAOA is a bit unique, in that it's mechanical function of the MAO-A enzyme would ostensibly explain some of the observations.
https://link.springer.com/article/10.1007/s11126-013-9287-x#page-1
I'd like to find the full paper on this again, but it seems to have been paywalled everywhere I look.
Distributions of low functioning variants vary greatly between "races", though most studies are on African American's, not Africans. It's prevalence is far less among American Caucasians, though. It's so rare in Asian populations, a large enough sample can't be found to study it.
That's just one area of genetic behavioral difference though. We're slowly learning of the genes that play key roles in IQ, but we're still a ways off.