What was the name of C.S. Lewis’s 1950 collection of radio talks about Christian belief?

C.S. Lewis’s 1950 collection of radio talks about Christian belief was Mere Christianity.

The book developed from broadcasts Lewis gave for the BBC during the Second World War. The talks were intended for a broad British audience and explained shared Christian ideas rather than defending one particular denomination. Lewis’s clear, conversational style helped make the broadcasts widely known.

The final book was assembled from several earlier broadcast series and revised for publication. It is often confused with The Problem of Pain, another major Lewis work about Christianity, but that book began as a separate study published in 1940. Mere Christianity instead presents an introductory case for common Christian doctrine.