"Principles of Ethics" is a fundamental work of the famous British philosopher George Edward Moore. In this book, the author examines the issues of morality, good and duties, trying to understand the nature of moral values and create a system of ethical principles. Moir examines the ethical decision from the point of view of individual conscientiousness and objective moral principles, and also argues for the need to adopt objective ethical norms. This book is considered a classic of modern ethics and still remains an important source for philosophical research in the field of ethics and morality.