Sullivan and Kymlicka seek to provide an alternative to post-9/11 pessimism about the ability of serious ethical dialogue to resolve disagreements and conflict across national, religious, and cultural differences. It begins by acknowledging the gravity of the problem: on our tightly interconnected planet, entire populations look for moral guidance to a variety of religious and cultural traditions, and these often stiffen, rather than soften, opposing moral perceptions. How, then, to set minimal standards for the treatment of persons while developing moral bases for coexistence and cooperation...