Which C.S. Lewis book examines four kinds of love, including friendship and charity?

The Four Loves is the C.S. Lewis book that examines four kinds of love, including friendship and charity.

Published in 1960, The Four Loves developed from a series of BBC radio talks. Lewis discusses four Greek terms used to distinguish forms of human affection: storge, philia, eros, and agape. In the book, he uses affection, friendship, romantic love, and charity as major categories for exploring how people relate to one another and to God.

Lewis does not present the four loves as completely isolated experiences. He examines their strengths, limitations, and dangers, especially when a natural human affection is treated as an absolute. The book therefore combines literary examples, Christian theology, and observations about ordinary relationships.

The title is sometimes confused with Mere Christianity because both began in broadcast talks and address Christian ideas. Mere Christianity focuses on the case for Christian belief, while The Four Loves concentrates specifically on varieties of love.