Aristotle"s Categories had an unparalleled influence on the history of metaphysical speculation. Despite its influence, however, two fundamental questions remain to this day unanswered: (1) how did Aristotle generate his list of categories? and (2) what is the relationship between Aristotle"s categories and his other great metaphysical system: hylomorphism? In this book, Paul Studtmann develops and defends an interpretation that offers a unified and striking answer to both questions: Aristotle"s system of categories is systematically derivable from hylomorphism, which in turn is derivable from general theses about the nature of being.