A central bond, a cherished value, a unique relationship, a profound human need, a type of love. What is the nature of friendship, and what is its significance in our lives? How has friendship changed since the ancient Greeks began to analyze it, and how has modern technology altered its very definition? In this fascinating exploration of friendship through the ages, one of the most thought-provoking philosophers of our time tracks historical ideas of friendship, gathers a diversity of friendship stories from the annals of myth and literature, and provides unexpected insights into our friends, ourselves, and the role of friendships in an ethical life. A.C. Grayling on Friendship (Vices and Virtues) New College of the Humanities, London.