The philosophy of ethics is witnessing a remarkable renewal in our time, whether in its questions, investigations or theories. There is - as it is said - a return to ethics and its issues in contemporary philosophy, after a period of criticism and doubt. This is witnessed by what you know of a renewal in German and Anglo-Saxon in particular. There is no doubt that this return is governed by the major transformations that our world is witnessing at various levels, which raise delicate ethical issues, related in general to the status and destiny of man and how he behaves in the face of the various challenges posed to him. Many contemporary philosophers contribute to this debate, which took various forms on the various ethical issues raised by scientific and technical development, the relationship of man to the environment and economic systems based on excessive consumption, and before that, the relationship of man to man. And if it is true that morals aim to achieve good behavior, and a measure of harmony and coexistence among people; Achieving this does not take place automatically or spontaneously, but rather through methods, perceptions, ideas, discussions, and even theories supported by evidence and evidence. In this sense, the ethics of duty play a central role in achieving this human goal, and constitute a basic orientation in the contemporary ethical discussion compared to other ethical orientations, especially those Concerning the ethics of benefit, what do we call duty? What is the ethics of duty? Who are the contemporary philosophers who say this theory? What is its value in the contemporary ethical discussion and what is its role in achieving human harmony?