What was the original title of C.S. Lewis’s Mere Christianity broadcasts?

The original title of C.S. Lewis’s Mere Christianity broadcasts was Broadcast Talks. The BBC first transmitted the talks during the Second World War, beginning in 1941.

Lewis was invited to explain basic Christian ideas to a general radio audience. He delivered the material in clear, conversational language rather than as academic lectures. The talks were later revised and expanded into books, eventually forming the work known as Mere Christianity.

The later sections were published under titles including Christian Behaviour and Beyond Personality before the material was collected. The title Mere Christianity refers to the shared core of belief Lewis believed was common to major Christian traditions, not to a separate denomination.