A favorite slogan of the Situationists during the social upheavals in Europe during May 1968 was "Be Realistic. Demand the impossible". Stretch out, dare to dream, go against the flow, and your dreams just might come true. The slogan might have been written to describe the mission of Richard Stallman, the one true begetter of GNU, the General Public License (GPL) and the free software movement, who has dedicated his life to realizing the dream of an operating system that is written from scratch and is totally free.