The Power of Clan examines the health effects of social change in a largely Italian-American town over a twenty-five-year period and provides substantial evidence of the protective effect of family bonds and shared social values against coronary heart disease and sudden death.

Stewart Wolf (1914-2005) was professor of medicine at Temple University School of Medicine in Philadelphia and director of the Totts Gap Medical Research Laboratories. Before his tenure at Temple University, he headed the department of medicine at the University of Oklahoma. He authored, edited, or co-authored numerous books, including Social Environment and Health, The Stomach, and Educating Doctors.

1. The Medical Significance of the Social Environment 2. Roseto's History: Turmoil, Cohesion, and Adaptation 3. A Medical Study of Neighboring Communities with Contrasting Social Patterns 4. Strategy of Inquiry: Subjects, Methods, and Hypothesis Testing 5. Mortality in Roseto and Adjacent Bangor, 1925-1985 6. Changing Prevalence of Myocardial Infarction, 1962-1985 7. Predictive Significance of Various Clinical and Behavioral Measures 8. Social Change, 1963-1988 9. Coda Photo Narrative. Roseto Evolving: A Century in America follows