Despite substantial work in a variety of disciplines, substantive areas, and geographical contexts, social memory studies is a nonparadigmatic, transdisciplinary, centerless enterprise. To remedy this relative disorganization, we (re-)construct out of the diversity of work addressing social memory a useful tradition, range of working definitions, and basis for future work. We trace lineages of the enterprise, review basic definitional disputes, outline a historical approach, and review sociological theories concerning the statics and dynamics of social memory.