"in the appendix of another book called The Abolition of Man"

The Abolition of Man was published in 1943, after Lewis had completed his first set of broadcast talks on The Case for Christianity. It "purports to be a book specifically about public education, but its central concerns are broadly political, religious, and philosophical."

National Review ranked it at #7 on its list of The 100 Best Non-Fiction Books of the Century. (Mere Christianity ranks #26.)