The Lean Startup: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses

Ries popularised a vocabulary — MVP, pivot, validated learning, build-measure-learn — that became the lingua franca of startups in the 2010s. Strip away the evangelism and the argument is tight: when uncertainty is high, the right unit of progress is not a feature shipped but a hypothesis tested. That single reframe is the book's real contribution. Ries's debt is to Toyota and Deming more than to Silicon Valley, even if the audience reads him the other way around. Reading it now is an exercise in historical grounding: every "lean" practice in contemporary product culture started here, and most of them have been degraded in transit.