How shall we break the grip of a scientific materialism whose values and standards will lead to the end of our civilization? By what higher moral force may we control the science that now threatens to destroy us? Science has become the victim of its technologists, as religion became the victim of its fanatics. Just as the spiritual truths of Christ were perverted by the temporal exploitation of Christian creed and dogma, so the intellectual truths of science are being perverted by the Material exploitation of industry and war. Hiroshima was as far from the intention of the pure scientist as was the Inquisition from the Sermon on the Mount. The personality and insight of a unique individual - one whose experience of flight and of life has been unique - give a strange force to this little book in which an airman, who is also a student of science, attempts to clarify the crisis the world faces, to communicate with men and women of similar concern, to search for a solution. The flight of his thought, in these pages, is like that flight of his, so many years ago, across the lonely wastes of the Atlantic. It is as solitary and daring.