Marxist ethics is a doctrine of morality and ethics that is based on, or derived from, Marxist philosophy. Marx did not directly write about ethical issues and has often been portrayed by subsequent Marxists as a descriptive philosopher rather than a moralist. Despite this, many Marxist theoreticians have sought to develop often conflicting systems of normative ethics based around the principles of historical and dialectical materialism, and Marx's analysis of the capitalist mode of production. By school of thought Marxism-Leninism The official Soviet interpretation of Marx's writings holds that morality, like other forms of ideology, is of a class character and is manifested in people's behavior in different ways throughout different historical conditions in accordance with the interests of what classes or social strata a person occupies. The main methodological principles of Marxist-Leninist ethics are materialism and dialectics. Marxist–Leninist ethics is materialist: the ideals, standards and virtues prevailing in society are interpreted as a reflection of actually existing interpersonal (value) relations, an expression of interests and requirements of social groups and classes. Morality is not reduced to an ethical ideology that has isolated itself from the world and lays claim to absolute value. Marxist ethics describes morality as a property of one's behavior conditioned by social and historical existence as those moral values that bring together (or force apart) living individuals. Marxist–Leninist ethics is dialectical: it maintains that like morality as a whole, each of its manifestations, each standard, and virtue, is in perpetual motion, emerging, developing, disappearing, passing from one qualitative state to another. Torn out of the concrete historical process, morality in general simply does not exist. Each type of morality is socially and historically conditioned—this is the fundamental tenet of Marxist ethics. The objective core of morality conveys the character of definite social relations—relations of ownership of the means of production, the interaction of the various classes and social groups and the forms of distribution and exchange. It follows from this that morality has class content. If the nature of social bonds determines the essence of morality (and in a class society these bonds manifest themselves, first and foremost, in the relations between classes), then the morality reflecting them has a class stamp. Any conception of human rights, to the Marxist-Leninist, are viewed as conceptual constructs granted to the individual by the emergent ideology of the collective. As a result, the Soviet state's treatment of human rights