Immanuel Kant's "Basic Principles of the Metaphysics of Morals" is a fundamental philosophical work in which the author examines basic moral principles and ideas. The book examines questions about morality, the definition of moral principles and their application to human life. Kant proposes his own system of moral values, in particular the concept of the categorical imperative, which is the fundamental principle of his ethical philosophy. The author emphasizes the importance of subjective moral obligation and a rational approach to determining moral norms. The book "The Basic Principles of the Metaphysics of Morals" by Immanuel Kant is an important work for understanding the basics of moral philosophy and its application in the modern world.