The Lean Startup has revolutionized how businesses build and launch products. Can these same techniques work for purpose as well as profits? Despite a number of unique challenges, the answer is a resounding yes. Around the world, social entrepreneurs, nonprofits, triple bottom line companies, and impact investors are starting to innovate for radically greater social good by running lightweight experiments, driving fast feedback loops, and accelerating learning. To do so, they have pioneered new ways to engage customers, measure impact, structure funding, and build business models that can drive exponential growth. Join Eric Ries, author of The Lean Startup and The Startup Way, and Ann Mei Chang for a special fireside chat on the eve of the launch of Ann Mei's new book, Lean Impact.