The ubiquity of friendship in human culture contributes to the fallacy that ideas about friendship have not changed and remained consistent throughout history. It is only when we begin to inquire into the nature and significance of the concept in specific contexts that we discover how complex it truly is. Covering the vast expanse of Jewish tradition, from ancient Israel to the twenty-first century, this collection of essays traces the history of the beliefs, rituals, and social practices surrounding friendship in Jewish life.