Which C.S. Lewis book presents a series of Christian radio broadcasts?

Mere Christianity presents C.S. Lewis’s Christian radio broadcasts.

The book grew out of talks Lewis delivered for the BBC during the Second World War. The first series, broadcast in 1941, was called “Right and Wrong: A Clue to the Meaning of the Universe.” Later broadcasts followed in 1942 and 1944.

Lewis revised the scripts for publication and eventually arranged them into the four-part book Mere Christianity. The title refers to the central beliefs shared across historic Christian traditions, rather than to a new denomination. The work discusses morality, belief, Christian conduct, and the doctrine of the Trinity.

The book is often confused with The Problem of Pain, which is a separate 1940 work focused on suffering and the problem of evil. Mere Christianity’s broadcast origin is especially significant because radio allowed Lewis to address a broad wartime audience beyond universities and churches. It became one of his most widely read apologetic works.