Among his friends at Berlin were Paul Kraus and Leo Strauss, the latter of whom would contribute the lengthy introductory essay to Pines' classic translation of The Guide. From 1937 to 1939 he taught the history of science in Islamic countries at the Institute of the History of Science in Paris. In 1940, he and his family departed for Palestine on the last boat leaving Marseilles before the Nazi occupation of France (during which time 25% of French Jews were deported and murdered).