Edward Berkowitz, Ph. D., Professor of History and Public Policy and Public Administration and Director of the Program in History and Public Policy, George Washington University, Washington, D.C. His areas of expertise include disability and social security. His most recent monograph, The Other Welfare: Supplemental Security Income and U.S. Social Policy, appeared with Cornell University Press in 2013. Other publications include: Robert Ball and the Politics of Social Security; America’s Welfare State: From Roosevelt to Reagan; Rehabilitation: The Federal Government’s Response to Disability; and Editor of Social Security After Fifty: Successes and Failures.