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varna, any of the four traditional social classes of India. The literal meaning of the word varna in Sanskrit (“color”) once invited speculation that class distinctions were originally based on differences in the degree of skin pigmentation between an alleged group of lighter-skinned migrants from Central Asia called “Aryans” and the darker-skinned indigenous people of ancient India. However, this theory of the origin of varna has been discredited since the mid-20th century. The term may...