Cass Sunstein

Nudge co-author; choice architecture.

Harvard Law School professor and former Administrator of the White House Office of Information and Regulatory Affairs (2009–2012). Co-authored *Nudge* (2008) with Richard Thaler, introducing 'libertarian paternalism' — the idea that default settings and choice environments can steer behaviour without restricting freedom. His work underpins behavioural public policy reforms in health, finance, and regulation worldwide.