What eventually became the internationally famous and influential book of Christian apologetics Mere Christianity began as a series of radio broadcasts. After his conversion, moving from convinced atheist skeptic to committed Christian within the Anglican Church, C. S. Lewis wrote some popular works of Christian apologetics, the rational defense of the Christian faith. He quickly gained a reputation as a significant Christian apologist. A religious segment on the British Broadcasting Company approached Lewis during World War II to ask him to provide some religious broadcasts during the height of the terror as a way of encouraging the British people and providing them with sound religious and intellectual formation. Lewis agreed and delivered what proved to be four immensely popular series of broadcasts. They dealt with morality as well as basic Christian beliefs about Jesus. The Christianity Lewis described was one that Catholics, Orthodox, Anglicans, and Protestants could mostly affirm and relate to, thus ensuring a wide audience. After the success of the broadcasts, Lewis published the texts of the four broadcasts as three small individual books. These slender volumes proved highly successful, and Lewis eventually published them as one single volume in 1952, entitled Mere Christianity.