What was C.S. Lewis’s wartime BBC talk series later published as?

C.S. Lewis’s wartime BBC talks were later published as Mere Christianity.

Lewis delivered the talks between 1941 and 1944, when Britain was fighting the Second World War. The broadcasts were intended for a general audience rather than for specialists. Lewis discussed morality, belief, Christian doctrine, and the claims shared by many Christian traditions. His conversational style helped make difficult theological ideas accessible to radio listeners.

The talks first appeared in print in stages. Broadcast Talks was published in 1942, Christian Behaviour in 1943, and Beyond Personality in 1944. These sections were later revised and brought together as Mere Christianity in 1952.

The title does not refer to a new denomination. Lewis used “mere Christianity” for the core beliefs that he believed were common to historic Christianity, while avoiding disputes that separated particular churches. The work became one of his most influential apologetic books and remains especially known for arguments about morality and the figure of Christ.