I think the general consensus amung scholars have stated that the Aryan invasion never happened. The so-call ''Aryans'' come from a culture in Southern Russia known as the Kurgans. The Kurgans existed around 3500 B.C. or later and built tumulis of dead,and some reason that these people were later responsible for spreading the Indo-European language from India to what is know Europe.

Know the other senerio is to the Harappa Valley Civlization that existed around 2500 B.C. or before. Most people reason that this was a Dravidian civlization,but know there are people who claim it was founded by people in Northern India,not Dravidians in Southern India. However,others state that the Aryans coming into India was a peaceful one where they lived toghter with the Dravidians.

From what I understand the original people of India were Austric type people like the Munda and in the Southern regions you have people called Veddoids. From what I understand Dravidians represent a migration of people that later merged with the other two groups.

Know,the Dravidians are deemed as caucasoid by most anthropologist,and ther Veddoids and Munda are called Austric or Australoid.

Maybe you can shed more light into the origins of these people. I admitt that Indian is not a particular place I study very much.