Thanks BhV. As far as Saraswat are concerned, they were originally (still are) found throughout the North-west region, and did flee from their dwellings when Moslem took over in west. However important to note is that they fled not just in one direction that is South, but in all directions including east-wards, himalaya-wards and so on. This includes a small branch of my own ancestor-ancestors who first fled eastwards to bengal, and when bengal meekly gave in, in a few centuries, they fled to the Nepal, and when came a brief period when islamist bengal invaded nepal too, they fled and finally settled where they are mostly found these days - in north-west bihar and north-eastern UP - around the time when there was a relative peace during sher shah suri - hemchandra period. Proper Saraswats of other branches are found in huge numbers throughout Haryana, West UP, and so on too. Much larger in population than in Konkana. Other streams of Saraswats likewise fled in many other directions too and are today found in large numbers totally outside of South.
(Above is what I have heard from those who know better in my village, have never done any research, but that seems credible to me)
Such migrations have been happening, for too many reasons to enumerate here, even before Islam was even born.
Examples we are looking for here are - "exodus" from Proper North India (Raj, UP, MP, Punjab, Kashmir, Bihar) to South by high caste population, which is alleged to now have a low IQ when comapred with that of their low caste bretheren in south. And Exodus on such scale, which can be remembered today, and was so big that IQ tilt happened, as suggested.
Coming to two examples that were cited earlier - that of one set of kayasthas in MH and saurashtrans in TN. As per the link you provided their total population even today is in a few thousands, after these many centuries. Imagine what would have been their original population. Smaller than the smallest fraction you can count as %age population of south or even TN. Same holds good for kayasthas. Also do compare how much population fled and how much stayed back. was the one that fled, a significant portion of total - so as to tilt the IQ regionally?
If we dont have such exaples, why did Northerners not flee away to south in bulk? Because my feeling is that except for TN, rest of the south was also facing the similar problems as North - more or less. 700/500 year Total Muslim Control on North India is a plain myth. There were enough safe places within North too, to have north-north migrations.
Now, having said this, I totally agree to HH that North lost its intellectual edge, which south still preserved. North became illiterate in sense of their heriditary transmission of knowledge. Intellect is different from Intelligence.
(Above is what I have heard from those who know better in my village, have never done any research, but that seems credible to me)
Such migrations have been happening, for too many reasons to enumerate here, even before Islam was even born.
Examples we are looking for here are - "exodus" from Proper North India (Raj, UP, MP, Punjab, Kashmir, Bihar) to South by high caste population, which is alleged to now have a low IQ when comapred with that of their low caste bretheren in south. And Exodus on such scale, which can be remembered today, and was so big that IQ tilt happened, as suggested.
Coming to two examples that were cited earlier - that of one set of kayasthas in MH and saurashtrans in TN. As per the link you provided their total population even today is in a few thousands, after these many centuries. Imagine what would have been their original population. Smaller than the smallest fraction you can count as %age population of south or even TN. Same holds good for kayasthas. Also do compare how much population fled and how much stayed back. was the one that fled, a significant portion of total - so as to tilt the IQ regionally?
If we dont have such exaples, why did Northerners not flee away to south in bulk? Because my feeling is that except for TN, rest of the south was also facing the similar problems as North - more or less. 700/500 year Total Muslim Control on North India is a plain myth. There were enough safe places within North too, to have north-north migrations.
Now, having said this, I totally agree to HH that North lost its intellectual edge, which south still preserved. North became illiterate in sense of their heriditary transmission of knowledge. Intellect is different from Intelligence.