A mesosystem comprises the interrelations among major settings containing the developing person at a particular point in his or her life. Thus, for an American 12-year-old, the mesosystem typically encompasses interactions among family, school, and peer group; for children, it might also include church, camp, or workplace, although the last would be less common in the United States than in some other societies. In sum, stated succinctly, a mesosystem is a system of microsystems.