In "The Life Course, Social Change, and the Chicago Tradition," Glen H. Elder Jr. connects early Chicago School sociology with modern life course theory, highlighting how rapid social change impacts individual trajectories. Elder outlines five principles—historical time/place, timing of lives, linked lives, human agency, and lifespan development—to explain how social change and adaptation affect human development. Read the full essay at Glen Elder's Website . The Life Course, Social Change, and the Chicago Tradition