casta

Caste comes from Portuguese and Spanish casta (race, lineage, breed, a category of people defined by inherited characteristics), from casto (pure, chaste, unmixed), from Latin castus (pure, morally clean, free from fault). The Latin castus is connected to the Indo-European root *kes- (to cut) — the pure thing is the thing that has been cut free from contamination, separated from mixture. The same Latin root gives English chaste, chastity, chasten, castigate, and the word caste itself via both Spanish and Portuguese. When Portuguese and Spanish colonists arrived in the Americas and in India, they brought with them the concept of casta as a category for classifying populations according to perceived racial and social purity of lineage. In colonial Spanish America, the casta system developed into an elaborate hierarchy of racial mixtures, with specific terms (mestizo, mulato, castizo, and dozens more) for different combinations of Spanish, indigenous American, and African ancestry.

The Portuguese use of casta in India was somewhat different from the Spanish colonial American system. When Portuguese missionaries and colonists encountered the social organization of Hindu society — its jatis (birth-groups) and the varnas (the four-part division of Brahmin, Kshatriya, Vaishya, Shudra) — they reached for casta as the closest available Portuguese concept. The social organization they encountered was ancient and complex, operating through rules of occupation, commensality (who may eat with whom), and endogamy (who may marry whom) that had developed over millennia of Indian social history. The Portuguese term casta imposed a European racial concept of hereditary purity onto a system whose internal logic was quite different, but the imposition stuck: the word entered English as caste in the seventeenth century specifically in the context of Indian social organization, and it has remained attached to India in English usage in a way it never did to Spanish America's more explicitly named racial hierarchy.

The word's adoption into English with specific reference to India happened primarily through the accounts of Portuguese travelers, the writings of Jesuit missionaries, and later the vast administrative literature of the British East India Company. European observers were struck by what seemed to them the hereditary, immutable quality of the divisions they observed — the fact that one's jati determined one's occupation, one's marriage pool, and one's social standing in ways that appeared from the outside to parallel the European concept of hereditary racial purity, even if the actual organizing principles were distinct. The colonial encounter hardened the categories: where Indian social organization had some permeability and regional variation, the colonial administrative need for clear classifications created more rigid categories than the system had before. Caste censuses, caste-based administrative policies, and caste-based legal interpretations by British courts paradoxically strengthened the rigidity of the system in some respects by treating it as more fixed and categorical than its actual practice.

In the twentieth century, caste became a central term in the global vocabulary of social justice, particularly through the work of B.R. Ambedkar — the Dalit jurist and architect of the Indian constitution — who argued that the caste system was not a religious or cultural feature of Hindu society but a system of graded inequality enforced through discrimination, untouchability, and social exclusion. Ambedkar's analysis transformed caste from an anthropological description of a social structure into a concept in the political vocabulary of equality and rights. The word has since been extended beyond its Indian context: sociologists in the United States have used 'caste' to describe the racial hierarchy of American society, most influentially in Isabel Wilkerson's Caste: The Origins of Our Discontents (2020), arguing that the relative positions of Black and white Americans are maintained by a caste logic — hereditary, immutable, encompassing — similar in structure to the Indian system.