What title was given to C.S. Lewis’s BBC broadcasts on Christianity, later published as a book?

C.S. Lewis’s BBC broadcasts on Christianity were later published under the title Mere Christianity.

Lewis delivered the talks during the Second World War, beginning in 1941. The broadcasts were intended for a broad radio audience and explained shared Christian beliefs rather than defending one particular denomination. Their accessible style helped make Lewis a prominent public religious communicator.

The material appeared in print in stages before being collected as Mere Christianity in 1952. The book is organized around arguments and explanations concerning morality, Christian belief, and the person of Jesus Christ.

The title does not mean “ordinary” or “unimportant” Christianity. Lewis used “mere” in the older sense of basic or essential. The work is often grouped with The Problem of Pain and Miracles, but those are separate books with different origins and emphases.