My first and only book, which appeared in the Spring of 2018, can be ordered here. The book is an intellectual history of European Catholicism from 1920-1970, asking how, when, and why the Catholic Church became “modern”: how, that is, Catholics came to accept the modern world of Church-state separation, religious freedom, and human rights. The answer turns out to involve much more than abstract questions of rights or statehood. The process of modernization involved a complex set of new Catholic ideas about the Church, the economy, the family, the Jews, and the state. It turns out, too, to have happened in multiple ways. There is no single “Catholic modern,” but several: specifically, the book unearths a conservative, anti-Communist form of Catholic modernism and a more radical antifascist alternative. Both, I argue, were legitimate updatings of the long Catholic tradition, and the contest between the two does much to explain the shape of the Church today.