This volume investigates how age serves as a fundamental organizing principle for social structures and individual life courses across diverse cultural and historical contexts. The authors, David I. Kertzer and K. Warner Schaie, synthesize perspectives from anthropology, psychology, and sociology to examine the mechanisms by which societies assign roles, expectations, and resources based on chronological age. By integrating cross-cultural data with longitudinal research, the text argues that age-based stratification is not a biological constant but a socially constructed framework that varies significantly depending on economic and political conditions.

Experts recognize this work as a foundational interdisciplinary text for scholars of life-course development and social stratification. Readers frequently note the academic density of the prose, which provides a rigorous examination of the structural forces shaping human aging.