A powerful and provocative critique of the foundations of Rational Choice theory and the economic way of thinking about the world, written by a former leading practitioner. The target is a dehumanizing ideology that cannot properly recognize that normal people have attachments and commitments to other people and to practices, projects, principles, and places, which provide them with desire-independent reasons for action, and that they are reflective creatures who think about what they are and what they should be, with ideals that can shape and structure the way they see their choices. The author's views are brought to bear on the economic way of thinking about the natural environment and on how and when the norm of fair reciprocity motivates us to do our part in cooperative endeavors. Throughout, the argument is adorned by thought-provoking examples that keep what is at stake clearly before the reader's mind.