Which C.S. Lewis book argues for the idea of objective moral values?

C.S. Lewis’s The Abolition of Man argues for objective moral values.

The book began as three lectures delivered at the University of Durham in 1943 and was published that year. Lewis responds to a style of moral education that, in his view, treated value judgments as merely subjective feelings. He argues that moral reasoning depends on a shared order of values, which he calls the Tao.

The work is a short philosophical and educational critique rather than a conventional narrative. Its three chapters examine moral education, the nature of value, and the consequences of attempting to reshape humanity through technological power without a stable moral standard.

The title can mislead readers into expecting a science-fiction story. Lewis was not describing the destruction of a city or species; he was warning that abandoning objective standards could reduce human judgment and agency.