Every mass movement is in a sense a migration—a movement toward a promised land; and, when feasible and expedient, an actual migration takes place. This happened in the case of the Puritans, Anabaptists, Mormons, Dukhobors and Zionists. Migration, in the mass, strengthens the spirit and unity of a movement; and whether in the form of foreign conquest, crusade, pilgrimage or settlement of new land it is practiced by most active mass movements.
