Which 1960 book by C.S. Lewis explores affection, friendship, eros, and charity?

C.S. Lewis’s 1960 book exploring affection, friendship, eros, and charity is The Four Loves.

The book grew from a BBC radio series broadcast in 1958 and was published in expanded form in 1960. Lewis organizes his discussion around four Greek terms commonly used to distinguish kinds of love: storge, philia, eros, and agape. In the book, he uses “affection” for storge and “charity” for agape.

Lewis examines ordinary human relationships, including family attachment, friendship, romantic love, and self-giving love. He does not present the categories as sealed compartments; instead, he considers how they overlap and how each can become distorted when treated as an absolute.

The work is sometimes confused with Mere Christianity because both began as broadcast talks and explain Christian ideas for general readers. The Four Loves is more specifically organized around human relationships and the meanings of love, while Mere Christianity covers a wider range of apologetic themes.