Eric Ries

American entrepreneur and author who wrote The Lean Startup — the most widely read book on new product development — and created the lean startup methodology: validated learning, build-measure-learn loops, minimum viable products, and pivots.

Created the dominant framework for new product development under uncertainty — The Lean Startup's core insight (startups fail not from lack of execution but from building something nobody wants; therefore, validated learning about customer behavior should replace business plan writing) redefined entrepreneurship and product management.