Most of us wonder how to make sense of the apparent moral excellences or virtues of those who have different visions of the good life or different religious commitments than our own. Rather than flattening or ignoring the deep difference between various visions of the good life, as is so often done, this book turns to the medieval Christian theologian Thomas Aquinas to find a better way. Thomas, it argues, shows us how to welcome the outsider and her virtue as an expression rather than a b...