Which C.S. Lewis work argues that objective values are threatened by modern education?

The Abolition of Man argues that objective values are threatened by modern education when students are taught to treat judgments as nothing more than personal feelings. C.S. Lewis published the book in 1943 after delivering the Riddell Memorial Lectures at the University of Durham.

Lewis’s argument responds to a contemporary English textbook that he calls “The Green Book.” He objects to its treatment of value judgments and maintains that human beings can recognize genuine goods, duties, and forms of moral order. He uses the term Tao for the traditional system of objective value that appears across different cultures.

The work is a short philosophical and educational critique, not a novel. Its three chapters are titled Men Without Chests, The Way, and The Abolition of Man. The book is sometimes confused with Mere Christianity because both discuss morality, but The Abolition of Man focuses more specifically on education, moral formation, and the consequences of rejecting objective value.