What type of broadcasts became the basis for C.S. Lewis’s Mere Christianity?

BBC radio broadcasts became the basis for C.S. Lewis’s Mere Christianity.

During the Second World War, Lewis delivered a series of short talks for the BBC. The talks were intended to explain core Christian beliefs in accessible language to a general audience, rather than to promote one particular denomination.

The broadcast material was later revised and published in book form. Mere Christianity first appeared as separate collections, including Broadcast Talks and Beyond Personality, before being assembled under its familiar title in 1952.

The book is organized around moral law, Christian belief, and the development of Christian character. Its title refers to the shared essentials of Christianity. Lewis also gave talks connected with other wartime subjects, but Mere Christianity specifically grew out of his BBC religious broadcasts.