高加索人種
Since the "Ozawa v. United States" court case had just decided that the meaning of white people for the purposes of the Court were people who were members of the Caucasian race, Thind argued that he was a white person by arguing that he was a member of the Caucasian race. Thind argued using "a number of anthropological texts" that people in Punjab and other Northwestern Indian states belonged to the "Aryan race", and Thind cited scientific authorities such as Johann Friedrich Blumenbach as classifying Aryans as belonging to the Caucasian race. Thind argued that, although some racial mixing did indeed occur between the Indian castes, the caste system had largely succeeded in India at preventing race-mixing. Thind argued that by being a "high-caste, of full Indian blood" he was a "Caucasian" according to the anthropological definitions of his day.