This article documents the neglect of love in many contemporary emotion theories, despite its prominence in the lay psychology of emotion. We argue that love should be considered a basic emotion, like anger, sadness, happiness, and fear. We discuss the criteria that various theorists use to distinguish basic from nonbasic emotions, and we marshal arguments and evidence from a variety of sources suggesting that love fits the criteria for basicness. We conclude that a number of controversies over the status of love can be resolved by distinguishing between the momentary surge form of love, a basic emotion having properties similar to joy, sadness, fear, etc., and relational love, a bond that develops between people, associated with states that include not only surge love, but many other emotions such as distress and anxiety. Finally, we suggest that “love” is the broad, everyday name for emotions related to three interrelated behavioral systems discussed by Bowlby (1979): attachment, caregiving, and sex.