Aryan Invasion - from where and when

From where and when, did the Aryans come to India?

When was the Aryan theory first propounded ?

Similarities in language first noticed by Sir William Jones, British Judge.

From there the theory of Aryan invasion theory took its course.

Views of the protagonists of the theory, and their reasoning.

A look at the then Germany which was the one other country to be influenced most by this Aryan theory.

The antagonists to this theory, why they felt that this theory not to have validity.

The information we find in the native literature of Aryan, Dravidian, Central Asian and European!

What is the present view of the Europeans with regard to the Aryan theory which was forcefully propounded by them in the previous century?

The need now is for a modern, scientific, historiographic understanding of migration, in the Indian context for the Indian mind.