A consideration of science, art, and technology is inevitably a study of basic human activities and their interrelations. The theme is an old one, and many pages by many writers in many centuries supply variations and commentary. Yet the theme is a timely one for an America that stands before decades of high promise and peril, and for this Review which has recently opened its pages to a discussion of the place of the arts in the unity of science movement. There also exists today an instrument—the theory of signs—which may prove of great power in meeting the recurrent demands for insight into the essentials of human culture. 1
