This document discusses the social profit sector in the United States economy, which includes non-profits. It notes that there are three sectors - government, for-profit business, and the voluntary non-profit sector where ideas to improve society can be exchanged. It discusses how early philanthropists like Rockefeller, Carnegie, and Ford helped establish philanthropy but did not create the sector. It also highlights the important role women played as social entrepreneurs and in filling gaps in society despite facing legal restrictions. The document advocates that an engaged citizenry is a valuable asset and introduces the concept of O.P.U.S. for overarching vision, purpose, strategies, and a scorecard to guide productive collaborative action in the social profit