Nudge: Improving Decisions About Health, Wealth, and Happiness

Thaler and Sunstein's argument is that choices are never presented neutrally — there is always a choice architecture — and that designing that architecture deliberately can improve outcomes without restricting freedom. The book coined "libertarian paternalism" and launched a generation of policy and product interventions based on defaults, framing and social norms. For product direction it is directly operational: every onboarding flow, every default setting, every opt-in/opt-out decision is applied Nudge, whether the team knows it or not. Read alongside Kahneman for the cognitive foundations and Cialdini for the persuasion mechanisms. Thaler won the Nobel Prize; this book is the accessible version of why.