Introducing Part Two of the book, this chapter sets the program for a revisionary interpretation of Kant’s ethics, broadly understood. The new interpretation aims to defuse standard objections, to offer a compelling reading of key texts, and to justify its method by giving us a better moral theory, in both Kant’s terms and ours. A first task for a moral theory with ambitions of application is to make a case for its value to those whom it would direct. For Kantian morality it is the creation of a morally shaped social environment made and managed over time by free, equal, and self-directing persons, an environment suited to the expression of their human rational nature: a moral habitat. To suit such a project, theorizing about moral practice should be hermeneutical, abstract first principles interpreted to render intelligible what morality is actually like for moral agents and moral subjects. We should come to see our duties as vehicles for habitat construction.