The basis of moral engagement in modernity has been the realization that human beings are importantly similar to one another; its aim is to act toward others in ways these similarities support and justify. That has made the aspirations of modern moral philosophy impartial and universal. The values of morality bind us together. Emblems of our commonalities, they urge us to expand our range of concern. But there are other values as well. Badges of our particularities, these values favour imposing limits on our solicitude. They direct us to treat different individuals differently, exactly because of their individual differences. They are, among others, the values of art, country and – the subject of this series of lectures – friendship.