Abstract

This dissertation argues that a proper understanding of Aristotle's theory of the virtues and vices requires us to understand how practical science presupposes theoretical science, more particularly the science of the nature of the morally-developed person. It argues that by using the canons of the Posterior Analytics we can prove why the virtues are causally necessary for the morally-developed person. Further, by seeing the virtues and vices in the context of the Physics, we can see how the development of these character traits might constitute the substrate principle which explains why different people respond to the world in the forms they do. ;Treating the virtues and vices as character traits and as the substrate principle underlying people's responses to the world points the way to treating them as the principle around which psychology, ethics and politics can all be integrated. The ethical virtues are rooted in the psychology of character while politics is a matter of organizing institutions so as to promote the development of determinate forms of character in given populations. Virtuous politics is taken to be that which organizes institutional structures and processes around the goal of human development. ;Throughout the dissertation I related Aristotelian insights to contemporary work in the realist philosophy of science, psychoanalysis, developmental psychology and Marx. ;This is a speculative work which, though inspired by Aristotle, is not presented as an exegesis of Greek texts