In this book Keith Graham examines the philosophical assumptions behind the ideas of group membership and loyalty. Drawing out the significance of social context, he challenges individualist views by placing collectivities such as committees, classes or nations within the moral realm. He offers an understanding of the multiplicity of sources which vie for the attention of human beings as they decide how to act, and challenges the conventional division between self-interest and altruism. He also offers a systematic account of the different ways in which individuals can identify with or distance themselves from the groups to which they belong. His study will be of interest to readers in a range of disciplines including philosophy, politics, sociology, law and economics.