Abstract

We have it on the authority of Aristotle that “reason (nous) is the best thing in us” (EN X.7, 1177a20). This idealization of reason permeates his account of eudaimonia, a term commonly translated as ‘happiness’, which Aristotle identifies with living and doing well (EN I.4, 1095a18-20). In harmony with a certain intellectualism peculiar to the mainstream of ancient philosophical accounts of eudaimonia, Aristotle holds that living well requires the unique practical application of rationality of which only humans are capable (EN I.7, 1098a13-15/EE I.7, 1217a25-27). This dissertation investigates Aristotle’s substantive view on the practical application of reason by examining how, according to him, human agents use reason to decide what to do, what kind of person to be, and indeed how to live well. A distinctively human way of making decisions is deliberation (bouleusis), an exercise of practical reason par excellence. The first chapter reconstructs Aristotle’s account of deliberation from a wide range of texts in the corpus. It argues that deliberation is a complex decision-making process that, for the most part, unfolds into four stages: (1) positing a provisional goal; (2) constructing a set of alternatives; (3) identifying the best alternative; (4) forming an intention to do the most proximate action as identified in the penultimate stage. This reading offers a comprehensive representation of Aristotle’s theory while rendering his theory more sophisticated—and indeed more modern—than the alternatives in recent years. Deciding what to do often requires that we confront the question, “Which is preferable (hairetōteron) or better (beltion) between two or more options?” In Topics III, a text widely acknowledged as the inaugural treatment of the logic of preference, Aristotle articulates a set of principles to guide our preference-ranking. While scholars pay historical homage to Aristotle, there is little engagement with his treatment of preference logic. The second chapter addresses the need for a current study and reassessment of Aristotle’s preference-ranking principles. It argues that, despite differences in scope and methodology between the Aristotelian and modern systems, the description inaugural treatment of preference logic comfortably, and accurately, applies to Topics III. When one looks at the role that Aristotle allows reason to play in the production and motivation of action, it is tempting to conclude that Aristotle endorses the Humean division of labor. For Aristotle claims that deliberation is about “the things towards the goal” (EN III.3, 1112b11-16) and that virtue (aretē) makes our goals right (EN VI.12, 1144a7-9). Chapter three seeks to show, against a recent influential quasi-Humean interpretation, that the primary function of practical reason is mapping the landscape of value corresponding to the agent’s reasoned conception of what eudaimonia consists in, as a rational being that she is. Aristotle notoriously defends the political subordination of individuals he believes to have a defective deliberative capacity. In Politics I.13, he claims that the deliberative faculty is undeveloped in children and “ineffectual” (akuron) in women (1260a12). The concluding chapter considers a puzzle about the development of the female’s deliberative faculty: How do women become ineffective in their deliberation, but freemen do not, given that all children have deliberative faculties that are unperfected? Drawing from the theories defended in previous chapters, I argue that the female’s deliberative defect is primarily due to her lack of moral education rather than inalterable sexual, biological differences—a thesis widely endorsed by scholars lately.