This book provides readers with a single source reviewing and updating sociological theory in medical or health sociology. The book not only addresses the major theoretical approaches in the field today, it also identifies the future directions these theories are likely to take in explaining the social processes affecting health and disease. Many of the chapters are written by leading medical sociologists who feature the use of theory in their everyday work, including contributions from the original theorists of fundamental causes, health lifestyles, and medicalization. Theories focusing on both agency and structure are included to provide a comprehensive account of this important area in medical sociology.