Which C.S. Lewis book collects his 1960 reflections on affection, friendship, and love?

The Four Loves collects C.S. Lewis's reflections on affection, friendship, erotic love, and charity.

The book was published in 1960 and developed from a BBC radio series. Lewis organizes his discussion around four Greek terms: storge, philia, eros, and agape. These names describe different kinds of love rather than four completely separate emotional experiences.

Storge refers to natural affection, philia to friendship, eros to romantic or sexual love, and agape to self-giving love. Lewis argues that human loves can be valuable while also becoming distorted when they are treated as ultimate or absolute.

The work is often misremembered as a simple list of four emotions. Lewis's argument is more layered: the loves overlap, depend on one another, and require humility. The book belongs to his popular Christian writings but also draws on classical language and ordinary social experience.