Examining, outlining, elucidating, and supplementing the existing body of scholarship concerning the medieval theological supposition that man was created as a replacement for fallen angels, Cur Homo? traces the implications of the question from the first century of the common era to the present day. First introduced by St. Augustine and developed by other church fathers, the concept truly flourished in the twelfth century, when it was decided that man is an "original" being, created for its own sake, for whom God created the world. Vojtech Novotny goes on to trace the idea as it gradually faded over the centuries and, more recently, has been revived in the fields of modern philosophical thought.