Writing his Habilitationsschrift as a young man in the late 1950s, future Pontiff Joseph Ratzinger argues that, when St. Bonaventure composed his Collationes in Hexaemeron in the spring of 1273, not since St. Augustine's De Civitate Dei contra Paganos had the world seen such a ground-breaking work on the logos of history. Indeed, for Ratzinger's Bonaventure, history is "first philosophy." The thirteenth-century Franciscan rails against the widespread...