John O'Malley works out a guide to the intellectual and historical developments behind the concepts of Catholic reform, the Counter Reformation, and, in his felicitous term, Early Modern Catholicism." "Trent and All That makes a case for subsuming the present confusion of terminology under the concept of Early Modern Catholicism. The term indicates clearly what this book demonstrates: that Early Modern Catholicism was an aspect of early modern history, which it strongly influenced and by which it was in itself in large measure determined.