Eric Ries

Eric Ries is the entrepreneur who turned his scar tissue from the virtual-world startup IMVU into a general method. His 2008 "Startup Lessons Learned" blog became The Lean Startup (2011), which sold over a million copies and put its vocabulary — MVP, pivot, validated learning — into every product conversation since. He later founded the Long-Term Stock Exchange.

A startup is an experiment in extreme uncertainty, so progress is validated learning, not features shipped; the build-measure-learn loop should spin as fast as possible, with the minimum viable product as the cheapest probe that generates real customer evidence; innovation accounting tracks whether the engine is improving (actionable metrics) rather than whether the chart goes up (vanity metrics); and the pivot — a structured strategy change that keeps one foot in what was learned.

Growth marketing inherited his epistemology wholesale — hypothesis, smallest test, metric, decision. The misreadings matter too, and he named them himself: MVP is not an excuse to ship junk, lean is not cheap, and a pivot is not a panic. Teams that quote the book but skip the measurement half are running build-build-build, which is the disease the method was written to cure.

Yale and Silicon Valley; co-founded IMVU (2004) where rapid-deployment practice seeded the method. He adapted lean manufacturing ideas (Toyota) and Steve Blank's customer development — Blank taught him at Berkeley and required the blog as a condition of investing. The book arrived September 2011.

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