The Moral Habitat is a book in three parts that begins with an investigation of three understudied imperfect duties which together offer some important and challenging insights about moral requirements and moral agency: that our duties only make sense as a system; that actions can be morally wrong to do and yet not be impermissible; and that there are motive-dependent duties. In Part Two, these insights are used to launch a substantial reinterpretation of Kant’s ethics as a system of duties, juridical and ethical, perfect and imperfect, that can incorporate what we learn from imperfect duties and do much more. The system of duties provides the structure for what I call a moral habitat: a made environment, created by and for free and equal persons living together. It is a dynamic system, with duties from the juridical and ethical spheres shaping and being affected by each other, each level further interpreting the system’s core anti-subordination value initiated in Kant’s account of innate right. The structure of an imperfect duty is exhibited in a detailed account of the duty of beneficence, including its latitude of application and demandingness. Part Three takes up some implications and applications of the moral habitat idea. Its topics range from the adjustments to the system that would come with recognizing a human right to housing to meta-ethical issues about objectivity and our responsibility for moral change. The upshot is a transformative, holistic agent- and institution-centered, account of Kantian morality.