Which 1943 book by C.S. Lewis examines the loss of traditional moral values?

The Abolition of Man is C.S. Lewis’s 1943 book examining the loss of traditional moral values. It developed from three lectures Lewis delivered at the University of Durham in February 1943.

Lewis argues that moral judgments are not merely expressions of personal feeling. He defends what he calls the Tao, a shared framework of basic moral principles found across different cultures and philosophical traditions.

The book is sometimes mistaken for a work of fiction because its title sounds like a dystopian novel. It is instead a compact work of moral philosophy and educational criticism. Lewis’s argument concerns how education that treats values as subjective may weaken the human capacities needed for responsible judgment.