Which C.S. Lewis book, published in 1943, argues that objective moral values are real?

The Abolition of Man is C.S. Lewis’s 1943 book arguing that objective moral values are real.

The work grew from three lectures Lewis delivered at the University of Durham in February 1943. He criticized an approach to education that treated value judgments as merely subjective emotional reactions. Lewis argued that moral training should cultivate appropriate responses to objective goods, a condition he called “the Tao,” drawing on a term associated with Chinese philosophy.

The book is not a conventional novel or a simple introduction to Christianity. It is a compact work of moral philosophy and educational criticism. Its final section considers how attempts to conquer nature could ultimately become attempts by some people to control others. The title refers to the loss of humanity’s moral inheritance rather than to a literal extinction of the human species.