The Indians as a race are known for their loquaciousness; they will talk a salesman out of his time and into the grave. Effectively, they love the sound of their own voice and draining your time and energy.
Interesting chart, also you'd expect the subcontinent that produced Ramanujan to also top those maths charts so either there's been IQ degradation in the subcontinent or the brain drain has led to the Ramanujans to flee elsewhere and it can't be the UK or the US because those countries certainly arne't on that list.
I think Ramanujan was just a huge outlier. Genetic stratification + large population will breed a large number of geniuses (total not per capita) even if the average is very low. Look at Indians in the US, average IQ is 110. But they are an outlier, not an accurate representation.
I know there was a lot of bullying about India's national IQ and how it has a mean IQ of 82, but the average in the most recent and comprehensive studies is adjusted lower to 76.
Of course not all of this is genetic, they still have severe stunting and iodine deficiency and everyone knows that the easiest ways to boost IQs is to improve micronutrient supplementation to those in abject poverty. But that has its limitations and I'm sure it'll never even reach 90 without some hypothetical techno-future enhancement.
