i agree with you that genetics has a role in it. but if malaysian indians are former dalits, which was the lowest caste (not even part of the caste system)
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2005 unskilled labor:
chinese 20% vs indian 35%
chinese were ahead of indians, but it's not a huge gap. according to you these indians are the lowest india has to offer in terms of genetics and they make up <20% of the indian population. so if you take the remaining 80+%, they should not be that far behind in terms of academics yes?