The menace of interplanetary imperialism can be overcome only by world-wide technical and political agreements well in advance of the actual event, and these will require continual pressure and guidance from the organizations which have studied the subject.


The Challenge of the Spaceship, The Challenge of the Spaceship (p. 8), Harper & Brothers. 1959


The menace of interplanetary imperialism can be overcome only by world-wide technical and political agreements well in advance of the actual event,...

The menace of interplanetary imperialism can be overcome only by world-wide technical and political agreements well in advance of the actual event,...

The menace of interplanetary imperialism can be overcome only by world-wide technical and political agreements well in advance of the actual event,...

The menace of interplanetary imperialism can be overcome only by world-wide technical and political agreements well in advance of the actual event,...