What is the title of C.S. Lewis's Christian apologetics book published in 1943?

C.S. Lewis's Christian apologetics book published in 1943 is The Abolition of Man.

The Abolition of Man developed from three lectures Lewis delivered at the University of Durham in 1943. The book examines moral education, objective value, and the consequences of treating moral judgments as nothing more than personal feelings or social conditioning.

Lewis uses the term Tao to describe a cross-cultural framework of basic moral principles. He argues that rejecting such objective values could reduce human beings to products controlled by people who claim mastery over nature. The argument is philosophical and cultural rather than a retelling of Christian doctrine.

The title is sometimes confused with Mere Christianity, The Problem of Pain, or Miracles. Those books address related religious questions, but The Abolition of Man is especially focused on education, moral realism, and the implications of technological power. It remains one of Lewis's most frequently discussed nonfiction works.