Documented customs, rites and practices, and the ethnographic studies that record them, spanning life-cycle ritual practice, marriage and alliance practice, exchange and reciprocity practice, religious and ritual practice, and social-control and conflict practice, drawn from cultural-anthropology ethnography and its founding case studies (van Gennep on rites of passage, Mauss and Malinowski on ceremonial exchange). Belongs here: a documented custom or practice studied ethnographically for its social function. Does not belong here: the doctrinal or theological content of an organized religious tradition, which Divinity atlas carries per this atlas's own scope charter seam, this category writing only the documented practice, not the tradition's own doctrine.