What was the title of C.S. Lewis’s 1950 collection of BBC wartime talks?

C.S. Lewis’s 1950 collection of BBC wartime talks is Mere Christianity. The book developed from radio broadcasts Lewis delivered during the Second World War, beginning in 1941.

The talks aimed to explain shared Christian beliefs in accessible language rather than defend one particular denomination. Lewis later revised and combined the broadcasts into a book, which became one of his most widely read works of Christian apologetics.

The title can be confused with Lewis’s other nonfiction books. The Problem of Pain was published in 1940, while Surprised by Joy, an autobiography, appeared in 1955. Mere Christianity is especially notable for presenting arguments about morality, belief, and Christian doctrine to a broad radio audience during wartime Britain.