The history of European colonialism covers many centuries and takes diverse forms, but whereas the European explorers and conquerors of the Americas, Africa, and Oceania usually took it for granted that the local inhabitants could be enslaved or butchered or driven into the hinterland at the whim of the invaders, the literate nations of Asia were initially treated as peoples toward whom the courtesies of European diplomacy should be applied. At the end of the day these Asian civilizations were likewise mostly subdued by force of arms, but such conquest needed some kind of moral justification, a mythical charter. The Rig Veda as interpreted by Max Müller and his contemporaries provided just such a myth.
Sir Edmund Leach. Aryan invasions over four millennia. In Culture through Time, Anthropological Approaches, edited by E. Ohnuki-Tierney, Stanford University Press, Stanford, 1990