Marxism-Leninism asserts that in a class society, all ideology and philosophy express the interests of a particular class. In Soviet educational and reference literature, the principle of party membership was interpreted in a unique way, placing an emphasis on its importance. There was a specific, "Soviet" scale used to evaluate philosophical works, based on the principle of party membership. This required exposing the class roots of philosophical systems, labeling idealistic theories as reactionary and materialistic theories as progressive. The Soviet government and party had control over scientific directions and approved of them. In post-revolutionary Russia, there were changes in party ideology and interpretations of Marxism. This lecture focuses on the role of party ideology in Soviet philosophy and how it evolved after the collapse of the USSR. It also addresses the challenges faced by Soviet students in studying these subjects and how philosophy was taught in universities after the Soviet Union's dissolution. The lecture title is "From Lenin to Stalin: Party Ideology as a Stimulus for Soviet Philosophy". The speaker discusses the unique characteristics of Soviet philosophy and the famous concept of "party membership of theory".