This book collects a series of articles by C. S. Lewis on the debate between ancient and modern times. These articles have a main thread, that is, the dispute between ancient and modern times or the difference between ancient and modern times. Aiming at the problems in modernity, Lewis pointed out that he did not understand the debate between ancient and modern times, and reflected that modernity can only lead to the vulgar mode of countering "modernity" with the latest popular "postmodern" ideological trend, and gave it ethical criticism.