We German mathematicians and physicists abroad have no reason for drawing such a sharp line between ourselves and our colleagues who have remained in Germany. We know that by far the greater part of them inwardly think as we think.
—Hermann Weyl 19361
Yo ur friends in America, for example, could not understand why you as a Dutchman chose to stay with the Nazis.
—Richard Courant 19452
IN 1953, the social scientist Franz L. Neumann (1900–1956), himself an immigrant to America, distinguished between three types of immigrants: those desperately clinging to their pasts; others embracing, often without a backward glance, the culture of their new home; and, finally, those attempting ...