Duke's Department of Philosophy has a strong faculty that is committed to excellence in both research and teaching. In a recent ranking of philosophy programs in the United States, the department was recognized for particular strength in the areas of philosophy of biology (rated as one of the two top programs in this area), philosophy of mind, political philosophy, applied ethics, philosophy of social science, 17th- and 18th-Century philosophy and Chinese philosophy. Expertise in the Department also extends to other areas of the history of philosophy such as ancient philosophy, Kant, 20th-Century analytic philosophy, and history and philosophy of science, as well as to philosophy of science, cognitive science, moral psychology, normative ethics, philosophy of law, metaphysics, epistemology, philosophy of language, and philosophical logic.