Chapter 86: Virtue Ethics: Character as Fixed Point

Deontological structure tells the agent what to do; virtue ethics asks what kind of agent to be. This chapter develops the Aristotelian tradition within the categorical framework: virtuous character is a stable fixed point of the habituation functor, the doctrine of the mean is constrained optimization on the virtue sheaf, practical wisdom is local section selection, and flourishing is the global section of a well-lived life. The Flourishing Theorem (VII.T34) shows that eudaimonia exists precisely when virtuous activity glues coherently across all life-stages. Virtue and deontology are complementary, not rival: the categorical imperative provides duties, virtue provides the character to satisfy them reliably.