Which 1943 C.S. Lewis book argues for the value of objective moral standards?

The Abolition of Man is C.S. Lewis’s 1943 book arguing for the importance of objective moral standards. It grew from three lectures that Lewis delivered at the University of Durham in February 1943.

Lewis criticizes an approach to education that treats moral judgments as merely subjective emotional reactions. He argues that human societies depend on a shared moral order, which he calls the Tao. In his view, rejecting that order risks producing people whose desires can be manipulated by technological power.

The book is not a novel and is not primarily a general introduction to Lewis’s Christianity. It is a short work of moral philosophy and educational criticism. Its three chapters are titled “Men Without Chests,” “The Way,” and “The Abolition of Man.”