"A Handbook of Ethical Theory" by George Stuart Fullerton is a scholarly examination of moral philosophy and ethics written in the early 20th century. The book aims to clarify key ethical concepts, explore various moral codes, and encourage critical reflection on accepted moral standards, making it a valuable resource for students of ethics in both academic settings and beyond. The opening of the book sets the foundation for this inquiry into ethical theory, emphasizing the importance of clear understanding when discussing morality. Fullerton introduces the concept of the "accepted content of morals" and highlights the diverse perspectives among moral thinkers throughout history. He calls into question the assumption that there exists a universal code of ethics while addressing the significant variances found in moral judgments across different cultures and communities. Through this groundwork, the author prepares the reader for a deeper exploration of ethical methods and the nature of human morality, establishing a critical framework for understanding and evaluating moral principles. (This is an automatically generated summary.)