House, James S. 2002. "Understanding Social Factors and Inequalities in Health: 20th Century Progess and 21st Century Prospects." Journal of Health and Social Behavior, 43(2): 125-142.
The development of social epidemiology and medical sociology over the last half of the 20th century, in which Leo Reeder played a central role, transformed scientific and popular understanding of the nature and causes of physical health and illness. Viewed in the early 1950s as shaped almost entirely by biological processes and medical care, physical health and illness are now understood to be as much or more a function of social, psychological, and behavioral factors.