The work of French philosopher Maurice Blondel lies behind most of the controversies in twentieth-century French Catholic thought, and bore its fruit in the Second Vatican Council. Recognized in Europe as one of the outstanding figures in the Catholic revival that began at the turn of the century, Blondel was described by Pope John Paul II as "one of the first to discern what was at stake in the Modernist crisis." Published together here are two of Blondel's most significant texts. The Letter on Apologetics (1896) is a key statement on the possibility and meaning of Christian philosophy. History and Dogma (1904), written in response to the Modernist crisis, is an important contribution to the notion of tradition, seeing it neither in terms of historicism nor as something mechanical, but as a living synthesis. Introductory essays by Alexander Dru and Illtyd Trethowan provide essential historical and biographical background as well as an account of the philosophical and theological principles of Blondel's thought.