What was the title of the 1952 book based on C.S. Lewis’s BBC talks about Christian belief?

Mere Christianity was the 1952 book based on C.S. Lewis’s BBC talks about Christian belief.

Lewis delivered the original radio talks during the Second World War, beginning in 1941. The broadcasts were aimed at a general audience rather than specialist theologians and explained shared Christian ideas such as morality, repentance, and the nature of God. Lewis revised and combined the talks into book form.

Mere Christianity is divided into four sections: “Right and Wrong as a Clue to the Meaning of the Universe,” “What Christians Believe,” “Christian Behaviour,” and “Beyond Personality.” The title does not mean a weak or minimal religion; it refers to what Lewis saw as common ground among major Christian traditions. The book is distinct from The Problem of Pain and The Screwtape Letters.