Which C.S. Lewis book examines the dangers of rejecting objective moral values?

The C.S. Lewis book examining the dangers of rejecting objective moral values is The Abolition of Man.

Published in 1943, The Abolition of Man grew from three lectures Lewis delivered at the University of Durham. The book responds to an approach to education that, in Lewis’s view, treated value judgments as merely subjective feelings rather than reflections of genuine moral order.

Lewis calls the objective moral order the Tao, borrowing a term from Chinese philosophy while applying it broadly to shared moral principles across traditions. He argues that discarding such standards could produce people shaped by technological power but cut off from the moral formation needed to use that power wisely.

The book is sometimes mistaken for a general political manifesto or for a work centered on Christian doctrine alone. It is more specifically a philosophical and educational critique, though its arguments connect with Lewis’s wider Christian understanding of human nature and morality.