The document discusses the definition, origin, and characteristics of the caste system in India. It defines caste as a group whose membership is based on birth and prohibits marrying outside the group. It describes the traditional characteristics of the caste system as the hierarchical and segmented division of society, restrictions on social relations and occupations between castes, and endogamous marriage. Theories on the origin of caste discussed include it having divine origins in Hindu texts, arising from occupational differences, racial differences between Aryan and Dravidian peoples, or being a new concept produced by British censuses.