C.S. Lewis delivered the broadcasts later collected as Mere Christianity on the BBC.
The talks were broadcast during the Second World War, beginning in 1941. Lewis spoke to a broad British audience about Christian belief, morality, and the common ground shared by major Christian traditions.
The original broadcasts were revised and assembled into book form. The resulting work, Mere Christianity, became one of Lewis’s most influential apologetic writings. Its title refers to a core Christianity rather than a particular denomination.
Lewis’s broadcasts were valued partly because of their conversational style. He used ordinary examples and direct argument rather than assuming that listeners had specialist theological training. The talks also helped establish his public reputation beyond his work as an Oxford literary scholar and author of fiction.