Marriage_Forms_And_Structure encompasses the various institutionalised arrangements through which societies organise conjugal relationships and reproductive partnerships. This class includes both the structural variations in spousal arrangements (monogamy, polygamy, polygyny, polyandry) and the temporal patterns of marital relationships (serial monogamy). It also encompasses alternative relationship forms that provide some marital benefits without full legal marriage status (domestic partnerships). These forms reflect different cultural, economic, religious, and legal approaches to organizing intimate partnerships, reproductive responsibilities, and household formation. The diversity within this class demonstrates how societies adapt marriage institutions to meet varying social needs, resource constraints, and value systems while maintaining social order and continuity.