Cass Sunstein

Cass Sunstein (born September 21, 1954) is an American legal scholar, economist, and political theorist who has been influential in shaping modern regulatory and behavioral policy. He earned his law degree from Harvard Law School and became a leading expert on constitutional law, administrative law, and behavioral economics. Sunstein served as Administrator of the White House Office of Information and Regulatory Affairs (OIRA) under President Barack Obama from 2009 to 2012, where he oversaw federal regulatory policy and promoted the concept of 'nudge' theory—the idea that subtle policy design changes can guide people toward better decisions without restricting freedom. He is the author or editor of numerous books exploring behavioral economics, including 'Nudge,' co-written with Richard Thaler, which became highly influential in policy circles worldwide. Prior to his government service, Sunstein was the Karl N. Llewellyn Distinguished Service Professor at the University of Chicago Law School. He has also held positions at Harvard Law School and continues to be an influential voice in contemporary debates about regulation, technology, and social policy. His work bridges academic rigor with practical policy application, making complex ideas about human behavior accessible to both specialists and general audiences.