The Metaphysics of Practice brings together Wilfrid Sellars's writings on topics to do with action, community, and obligation: published essays, manuscripts, and correspondence. Sellars's practical philosophy was absolutely central to his overarching philosophical project of situating persons as practically rational, norm-governed animals within the world as described by an ideal science. The Editors' Introduction offers an overview of Sellars's metaethics, detailing its key features and explaining how these features are supposed to solve outstanding metaethical problems that not only faced Sellars's contemporaries, but continue to create lively debate among contemporary theorists. And the editors give chapter summaries indicating the main lines of argument and showing where each piece fits into Sellars's overall picture.