As
@Mad Indian mentioned, AIT/AMT have pretty much been kicked out, even linguistically, which is really the only domain where they are even discussed due some inconsistencies their solution proposed i is full of holes, and is by no means conclusive.
AIT is not even talked about these days by even it's last defender Witzel, (but he still says there was a migration, and that he has genetic proof.....which he conveniently refuses to present).
When
@Peter wrote in the
other thread about AIT/AMT being "absolutely true" I was surprised because almost no one apart from some hardcore dravidian nationalist types believe in that.
When I asked for proof about what makes him sure about AIT, he confuses ANI/ASI populations living in India some 50,000 years ago (atleast) as Aryans and Dravidians and worse presents that as "proof" for Aryan invasions, an event that supposedly occurred 3000-4000 years ago.
Here is a very simple to the point write up, with multiple references to studies done by MIT and nature magazine.
This has been pretty much accepted by most anthropologists, refer to the thread posted above for statements.
Here is the important one:
"This paper rewrites history... there is no north-south divide."
"There is no truth to the Aryan-Dravidian theory as they came hundreds or thousands of years after the ancestral north and south Indians had settled in India."
The study analysed 500,000 genetic markers across the genomes of 132 individuals from 25 diverse groups from 13 states. All the individuals were from six-language families and traditionally upper and lower castes and tribal groups. "The genetics proves that castes grew directly out of tribe-like organizations during the formation of the Indian society."
"Impossible to distinguish between castes and tribes since their genetics proved they were not systematically different."
The present-day Indian population is a mix of ancient north and south bearing the genomic contributions from two distinct ancestral populations - the Ancestral North Indian (ANI) and the Ancestral South Indian (ASI).
"The initial settlement took place 65,000 years ago in the Andamans and in ancient south India around the same time, which led to population growth in this part,'' said Thangarajan. He added, "At a later stage, 40,000 years ago, the ancient north Indians emerged which in turn led to rise in numbers here. But at some point of time, the ancient north and the ancient south mixed, giving birth to a different set of population. And that is the population which exists now and there is a genetic relationship between the population within India."
The study also helps understand why the incidence of genetic diseases among Indians is different from the rest of the world. Singh said that 70% of Indians were burdened with genetic disorders and the study could help answer why certain conditions restricted themselves to one population. For instance, breast cancer among Parsi women, motor neuron diseases among residents of Tirupati and Chittoor, or sickle cell anaemia among certain tribes in central India and the North-East can now be understood better, said researchers.
The researchers, who are now keen on exploring whether Eurasians descended from ANI, find in their study that ANIs are related to western Eurasians, while the ASIs do not share any similarity with any other population across the world.