Title page -- Copyright page -- Contents -- Introduction -- Faith and reason in the Church Magisterium from Pius IX to Fides et ratio -- Chapter 1 Pius IX (1846-1878) between the Qui pluribusand the Syllabus -- Chapter 2 Faith and reason in the First Vatican Council -- 2.1 From the Syllabus to the First Vatican Council -- 2.2 The constitution Dei Filius -- Chapter 3 Leo XIII and the Aeterni Patris -- Chapter 4 Faith and reason in the light of Fides et ratio -- 4.1 Fides et ratio after Dei Filius and Aeterni Patris -- 4.2 Truth, foundation and metaphysics -- 4.3 The historical reconstruction of Chapter 4 -- Chapter 5 For a comprehensive review -- 5.1. Difference and reciprocity of faith and reason -- 5.2 The crisis of reason and of the relationship reason-truth -- 5.3 Post-modernity as the name of contemporary times. A brief analysis -- 5.4 Going beyond the reductionism of post-modern reason -- 5.5 Faith and reason: a necessary encounter, if both are "loyal" to themselves -- Notes -- Notes to accompany the Introduction -- Notes to Chapter 1 -- Notes to Chapter 2 -- Notes to Chapter 3 -- Notes to Chapter 4 -- Notes to Chapter 5 -- Bibliography.