Return from the Stars [first edition]

Hal Bregg is an astronaut who returns from a space mission in which only 10 biological years have passed for him, while 127 years have elapsed on earth. He finds that the earth has changed beyond recognition, filled with human beings who have been medically neutralized. How does an astronaut join a civilization that shuns risk? Translated by Barbara Marszal and Frank Simpson. A Helen and Kurt Wolff Book