Philosophy of Ethics is a translation of the Persian book Falsafeh-ye Akhlaq by the great Muslim thinker and reformer Ayatullah Murtada Mutahhari. Some of the topics discussed in this book are as follows: what-ness of ethics, natural action and moral action, theory of emotionalism, conscience theory, Islamic ethics and morality, self and non-self, knowledge of the self, spiritual and moral crises in the present age and the criterion for moral action. We hope that this book would be an invaluable contribution to Islamic thought and of great benefit for all readers in general and people of research in particular. The Mutahhari Theology Series - Is a series of books that delve into the various contributions of Ayatollah Mutahhari.