Which C.S. Lewis work presents his BBC wartime broadcasts about Christianity?

Mere Christianity presents C.S. Lewis’s BBC wartime broadcasts about Christianity.

The book grew from radio talks Lewis delivered for the BBC between 1941 and 1944, during the Second World War. He aimed to explain shared Christian beliefs in accessible language rather than argue for one particular denomination.

The work is organized around themes including morality, Christian belief, and the doctrine of the Trinity. Lewis’s radio style helped make difficult ideas memorable, and the talks reached a broad British audience during a period of national crisis. The book’s title refers to what Lewis called the common or central beliefs of Christianity.

Mere Christianity is not a transcript of one uninterrupted broadcast series. Its final form combines material from several sets of talks, with revisions and rearrangement. Readers also sometimes mistake the “mere” in the title for “minimal”; Lewis intended it to suggest the central, shared core of Christian belief.