This book presents a positive account of Aristotle’s theory of political economy, arguing that it contains elements that may help us better understand and resolve contemporary social and economic problems. The book considers how Aristotle’s work has been utilized by scholars including Marx, Polanyi, Rawls, Nussbaum and Sen to develop solutions to the problem of injustice. It then goes on to present a new Social Welfare Function (SWF) as an application of Aristotle’s theory. In exploring how Aristotle’s theories can be applied to contemporary social welfare analysis, the book offers a study that will be of relevance to scholars of the history of economic thought, political theory and the philosophy of economics.