First delivered as a series of lectures, C.S. Lewis' The Abolition of Man: Reflections on Education with Special Reference To the Teaching of English in the Upper Forms of Schools is an immensely popular and important book. Categorized by Amazon as a book in the Christian Theological Anthropology genre, Lewis sets out to defend both objective value and natural law. He also warns of the consequences of ignoring and/or "debunking" these things. In the book, Lewis also sets out to persuade readers that courage and honor are becoming increasingly more important values in the modern world.
Upon release, The Abolition of Man received unbelievably positive reviews. One reviewer called the book "simply amazing." Another loved the book, writing:"This is not the sort of book you take to the beach for a leisurely read. Nor is it the kind of book you read in bed before retiring; no, this is the kind of book you need to sit up straight in a chair for, with a notebook and pen, or at least a highlighter". Regarded as Lewis' best work, The Abolition of Man is in seventh place on National Review's list of "100 Best Nonfiction Books of the Twentieth Century."
More remarkably, though, Lewis' book is still being debated today. It was popular when released and will continue to be popular very far into the future. It is truly an important book.