Arguably, Müller’s most important contributions are to the philosophy of action and virtue ethics. The contributors, who include friends, colleagues, and former students, engage with different aspects of Müller’s thought in these areas. Subjects include his interpretation of Aristotle and Wittgenstein, the teleology of thought and action, the Aristotelian distinction between and and its application to ethical upbringing, and the possibility of practical knowledge and practical truth. will be of interest to researches and advanced students working on virtue ethics, philosophy of action, and practical reasoning.