In this essay on man, Mr. Fuller expresses what may well be his penultimate view of the human condition. Here, in a mood at once philosophical and involved, he traces humanity’s intellectual evolution and weighs our capability for survival on this magnificent craft, this Spaceship Earth, this superbly designed sphere almost negligible in dimension compared to the great vastness of space. Mr. Fuller is optimistic that we will survive and, through research and development and increased industrialization, generate wealth so rapidly that we can do very great things. But, he notes, there must be an enormous educational task successfully accomplished right now to convert our tendency toward oblivion into a realization of his potential, to a universe-exploring advantage from this Spaceship Earth.