Annotation: The article relieves the basic principles of the philosophical and legal concept of Karl Marx. It gives its general characteristics and reviews the main scientific works of the founders of Marxism Karl Marx and Friedrich Engels, and their followers, critics and supporters of the new course - neo-Marxism. The author analyzes the theory of the origin of state and law, the class-materialist theory, the theory of violence. It considers the problem of the formulation of violent theory by its founders and reconsideration by followers and the possibility of applying the philosophical and legal concepts of Karl Marx in accordance with the present realities.