[tassl]

>t might work if intelligence wasn't important for members of lower castes but was for higher castes, perhaps due to the nature of their culture or work. Then low castes wouldn't select for intelligence but high castes would. Not saying that's what actually happened but it shows that selective pressure could still exist without inter-caste mobility.

This makes absolutely no sense, unless the "not so smart" were not considered for reproduction or were eliminated. How are you selecting for IQ if the only thing you need to get married is to be in that cast? Arranged marriages don't help with natural selection; you just need to exist in the right family.

[timwaagh]

It really depends how things work over there. Castes are associated with jobs and I have seen some articles that some 'teacher' cast has higher intelligence, just like eg ashkenazi jews. It could be that being pretty unsuccesful at your caste-assigned job would have left you unemployed and thus not being able to support a family, thus not being able to marry. thats obviously speculation, of course.

[tassl]

It does not make any sense, no matter how you look at it.

Sure, you can see those "articles", but don't forget that those are going to be based on IQ tests, and those are correlated with intelligence and... wait for it... education.

If I was of the superior caste that's what I would try to make people believe: "we are superior, and we are here because we are smarter than you. Best of luck in your next life".