Dr. William Marshner has once again given an excellent FREE audio series through the Institute of Catholic Culture. While an earlier post describes the background of Dr. Marshner and his last talk (on the Council of Trent), his new three-part series examines the Roots of Modernism. This may seem to be a topic which many are familiar with, but Dr. Marshner addresses the matter by giving a historical narrative and philosophical critique of the various schools of modernist thought and their adherents. It is definitely worth checking out.
For further study, Dr. Marshner recommends reading a great book by Maurice Mandelbaum called History, Man, & Reason: A Study in 19th Century Thought.