In 'Four Phases of Morals: Socrates, Aristotle, Christianity, Utilitarianism' by John Stuart Blackie, the author delves into the evolution of moral philosophy through the lenses of four major perspectives. Blackie explores the teachings of Socrates and Aristotle, highlighting their contributions to ethical thought. He then delves into the moral teachings of Christianity, analyzing its impact on Western society. Finally, Blackie discusses Utilitarianism and its role in modern ethics. The book is written in a scholarly and thought-provoking style, providing a comprehensive overview of moral philosophy throughout history. Blackie's analysis offers valuable insights into the development of moral beliefs and how they have shaped societies. This book is a must-read for anyone interested in the history of ethics and the philosophical underpinnings of morality.