Kant’s general taxonomy of duties includes substantial claims that normatively and theoretically differentiates it from other moral theories. Basing his moral theory on a conception of Right, he also made a general classification of several duties with their corresponding moral worth. The general aim of this study is to identify the basic principles and criteria that determine Kant’s classification of duties. Another aim is to trace some implications and effects of Kant’s conception of duties in the contemporary discussion of social (...) and economic rights. We argue that the normative basis of the argument against social and economic rights is very similar to that of the principles Kant uses in his classification of duties. However, from the responsibility of the state, Kant imposes legitimate obligations over individuals, albeit indirectly. (shrink)