A caste system is a rigid social hierarchy in which people are born into ranked groups that determine their status, occupation, and whom they can marry, with very limited chance to move between these groups. It is one of the strictest forms of social stratification and has historically led to exclusion and discrimination against those placed at the bottom.

Quick Scoop: What Is a Caste System?

A caste system is a form of hereditary social stratification where your family of birth fixes much of your life: social status, typical jobs, and social relationships. These systems emphasize ideas of “purity” and “pollution,” with higher castes seen as more pure and lower castes treated as impure or even “untouchable.”

Core Features

  • Birth-based group membership; you are born into a caste and usually remain there for life.
  • Strong social rules about marriage (often endogamy, meaning marrying within your own caste).
  • Occupations and economic roles traditionally tied to caste, especially in historical systems.
  • Hierarchical ranking from “high” to “low,” with some groups facing extreme exclusion, such as Dalits in South Asia.
  • Very limited social mobility compared with class systems, where income and education can more easily shift status.

How It Differs From Class

In a class system, wealth, education, and job changes can significantly alter your social position, even if inequality remains. In a caste system, status is legally or culturally tied to ancestry and religious or cultural beliefs, so changing your education or income may not fully change how society treats you.

Historical and Modern Context

In South Asia, especially India, the caste system became closely linked with religious tradition and social order, with society segmented into many birth-based groups. Colonial and postcolonial periods reshaped but did not instantly erase caste hierarchies, and debates continue about how much they influence politics, wealth, and everyday life today.

Beyond South Asia, scholars also use “caste” to describe other rigid, birth- based hierarchies, such as racial caste ideas that link ancestry, race, and enduring social disadvantage. Contemporary discussions highlight how caste, race, and gender can intersect and intensify inequality, especially for women in lower-ranked groups.

At its core, a caste system is not just about difference; it is about ranking people into “higher” and “lower” groups and then enforcing that ranking across generations.

TL;DR: A caste system is a strict hereditary hierarchy that ranks people by birth, limits marriage and jobs across groups, and often entrenches long- term inequality and discrimination.

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