"Where there is no vision the people perish..." (Proverbs 29:18) Visionaries imagine a better world and ask, why not? In this episode, we talk with visionaries who focus, in one case, on a new ethic for living on earth, and in the other, on a way of bringing back resources from off the earth, from asteroids. Most sharply new ideas seem improbable. Many are. But the others, with their champions, are the way humans advance.