This book, the author wrote in 1931, is an attempt to judge contemporary ideas in the field of morals, religion, science, evolution, sociology, psychology and humanism in the light of the philosophical daylight called 'common sense.' If at times it criticizes certain views on the grounds of their unreasonableness, it does so to prepare for a view which seems more reasonable. If at other times it shows that what is wrong with a certain philosophical outlook is an emphasis on a part against the whole, it does so in order to suggest a view that is more catholic in the sense of being the whole truth. There is little sympathy in these pages for those who believe that everything modern is good, or that everything modern is bad. The remarkable -- if unsettling -- discovery is that seventy-five years later, Bishop Sheen's challenge o tired old errors still finds some of them huffing and puffing under entirely new garb. No reader who is familiar with the Servant of God, Archbishop Fulton J. Sheen (1895-1979) — either from his many other books or from his television appearances (presently being rerun on EWTN) — needs to be told of the extraordinary breadth of his interests and the wide-ranging extent of his library. He was truly a renaissance man in every sense of the word, someone who was very well read in theology, philosophy, literature, art, science and politics. The present work is a veritable treasure trove of wisdom and insight in all of these areas. That said, many of the citations to be found in this book, which was originally published in the early 1930’s, will probably be unfamiliar to many today, so it was felt that it might be helpful to add to Sheen’s flawless text a few footnotes to assist in a fuller appreciation of the depth and scope of his still relevant insights into these old errors with new labels.