1. Philips P. Moulton, ed., The Journal and Major Essays of John Woolman (Richmond, VA: Friends United, 1989).
2. Boulding described the earth as a spaceship as follows:
“In the imagination of those who are sensitive to the realities of our era, the earth has become a space ship, and this, perhaps, is the most important single fact of our day. . . . It is not only that man’s image of the earth has changed; the reality of the world social system has changed. . . .
The consequences of earth becoming a space ship for the social system are profound and little understood. It is clear that much human behavior and many human institutions in the past, which were appropriate to a [seemingly] infinite earth, are entirely inappropriate ...