In the aftermath of World War I, the city of Vienna was no longer the capital of the sprawling Hapsburg empire, but of the small country commonly referred to as “rump Austria.” Yet it remained a thriving center of cultural and intellectual life. One particularly influential example was the Vienna Circle, an interdisciplinary group—its best-known member was the mathematician Kurt Gödel—interested in the relationship between language and philosophy. Deeply influenced by the Viennese philosopher Ludwig Wittgenstein, himself a Christian of Jewish descent, the group consisted of both Jews and Christians, but was understood to be somehow “Jewish.” Adam Kirsch, reviewing a new book on the circle, The Murder of Professor Schlick, explains:

From synagogue shootings, to attacks on Jews on the streets, to the gathering strength and viciousness of anti-Zionism, especially in the corridors of political power, American Jewry has ample reason for concern about its safety and wellbeing. But, surveying both the present situation and the deep roots of what has made America a welcoming home to Jews with “no analogue in the 2,000 years after the destruction of the Temple,” Josef Joffe argues that the U.S. remains exceptional. The bad news, however, is still bad: