Eric Ries

Ries spent years at IMVU shipping features nobody used before codifying what he learned — heavily influenced by Steve Blank's customer development classes, which he took as a condition of Blank's investment. The Lean Startup turned that experience into the default operating manual for early-stage teams.

Ries turned a painful pattern — years at IMVU shipping features nobody used — into the defining startup methodology of its generation. The Lean Startup gave founders a vocabulary (MVP, pivot, validated learning) so useful it escaped into general business culture, and its Lean Series brought companion volumes like Lean Analytics under the same roof. His later work took the method upstream: The Startup Way applied it inside GE and Toyota, and the Long-Term Stock Exchange — a real, SEC-approved exchange — is his bet that public markets themselves can be re-engineered for long-term thinking.