Which book by C.S. Lewis collects his BBC broadcasts explaining Christian belief?

Mere Christianity collects C.S. Lewis’s BBC broadcasts explaining Christian belief.

Lewis delivered the original radio talks during the Second World War, beginning in 1941. The broadcasts were intended for a broad British audience and presented basic Christian ideas in accessible language rather than focusing on one denomination’s distinctive practices.

The talks were revised and published in stages before appearing together as Mere Christianity in 1952. The title refers to the shared core of belief Lewis believed was held across the major Christian traditions. The book discusses morality, belief, Christian virtues, and the meaning of conversion.

Mere Christianity is sometimes confused with The Problem of Pain, another Lewis book about Christianity that appeared in 1940. It is also distinct from The Screwtape Letters, which uses fictional letters from a demon as its literary form. Mere Christianity grew directly from Lewis’s wartime broadcasts.