" Once you start offering reasons for ignoring the interests of others, however, reasoning itself will usually draw you into a kind of universality. A reason is an offer of a ground for thinking or feeling or doing something. And it isn’t a ground for me, unless it’s a ground for you. If someone really thinks that some group of people genuinely doesn’t matter at all, he will suppose they are outside the circle of those to whom justifications are due. "

― Kwame Anthony Appiah , Cosmopolitanism: Ethics in a World of Strangers