Which C.S. Lewis book records his wartime BBC talks about Christian belief?

Mere Christianity records and develops C.S. Lewis’s wartime BBC talks about Christian belief. The talks were broadcast in Britain between 1941 and 1944 and later revised into book form.

Lewis designed the broadcasts for a general audience rather than for theologians. He discussed morality, human nature, Christian doctrine, and the claims shared by the major historical Christian traditions. His conversational style helped make abstract arguments accessible to radio listeners.

The title refers to what Lewis called “mere Christianity”: the central beliefs held in common by Catholics, Protestants, and Orthodox Christians. The book is not a complete account of every denominational difference, which is why its scope is narrower than the title may suggest.

Mere Christianity is sometimes confused with The Problem of Pain, another Lewis work on Christianity. The Problem of Pain was published in 1940 and was not the book created from the BBC broadcasts.