The article discusses the key ideas of professor K.N. Lyubutin (1935-2018) - one of the founders of the Faculty of Philosophy at the Ural University (1965), the Chair of History of Philosophy at this University (1969), and the founder, inspirer and leader of the Ural School of Marxist Studies. The author focused (1) on Konstantin Lyubutin's ideas, which at time were innovative in the framework of Soviet Marxism-Leninism (explication of K. Marx's philosophical and anthropological ideas; separation of K. Marx's philosophical ideas and F. Engels's philosophical searches the paradigms of classical Marxism; the innovative solution to the problem of subject and object), and the post-Soviet history of Russian philosophy (Russian versions of Marxism); (2) on the ideas, which were not presented in a systematic and complete form in printed works, but rather were expressed fragmentary in the context of researching other problems, in numerous lecture courses, and in interviews and personal conversations (revealing the specifics, structure and subject matter of K. Marx's philosophy; the system of Marxist philosophy). All K.N. Lyubutin's ideas are relevant today, especially in the conditions of renaissance of Marx at the beginning of the XXI century.