A critical study of some leading theories in ethics, with close attention to major works, chiefly modern and contemporary. Topics include naturalism, intuitionism, emotivism, utilitarianism, Neo-Kantian ethics, and various current positions.

Prerequisites: All 400-level philosophy courses have a prerequisite of 9 hours of philosophy, or permission of the instructor. All 800-level philosophy courses have a prerequisite of graduate standing, or permission of the instructor.

Frequency: Philosophy 423/823 is offered once every two years.