It is the intent of the authors of our "Thomistic philosophy course" to help students make contact with the texts of the great thinkers studied in the history of philosophy. For this purpose, are provided within the proper limits of an introductory work, the largest possible extent and variety of texts and fragments of the most representative authors of every age, precisely those who figure prominently in the exhibition of the volumes for. In this volume include the following authors: Marx, Kierkegaard, Nietzsche, Comte, Bergson, Blondel, Husserl, Heidegger and Marcel.