Collection of publications, texts of speeches and interviews, letters and telegrams. The fifth edition[edit] - M. : Politizdat, 1968 - 526 s. : il. In the full collection of works in . and . Lenin includes his books, as well as articles and interviews published in various organs of the Russian and foreign press; reports and speeches by B. and . Lenin at party congresses, conferences, congresses of the Soviets, congresses of the Comintern, speeches at meetings of the leading centers of the party, at mass meetings and rallies; leaflets, statements, addresses, program documents, draft resolutions, decrees, greetings, the author of which was V. and . Lenin, letters, telegrams, notes, recordings of conversations over a direct wire, questionnaires and other materials. Eighteenth volume of the Collected Works of . [ and . Lenin contains the work "Materialism and empirio-criticism", written in February - October 1908 and published in a separate book in May 1909, as well as the well-known "Ten Questions to the Referent", which were used as theses I. F. Dubrovinsky, acting on behalf of . and . Lenin against the Machist views of Bogdanov and his supporters at the abstract in Geneva in May 1908 . “Materialism and Empirio-Criticism” is the main philosophical work of the B. and . Lenin . Its historical significance lies in the further development of Marxist philosophy, in the answer to the fundamental philosophical questions that confronted the Party at that time, in the philosophical generalization of the latest achievements of natural science. In it, Lenin comprehensively criticized reactionary bourgeois idealist philosophy and philosophical revisionism. Materialism and Empirio-Criticism is an example of Bolshevik Partyism in the struggle against the enemies of Marxism, in which passionate revolutionaryness and deep scientificity are organically combined. Lenin's book "Materialism and Empirio-Criticism" played an outstanding role in the ideological arming of the Bolshevik Party, in the struggle against all forms and varieties of opportunism, all and every kind of falsifier of Marxism in the working-class movement in Russia. In. and . Lenin emphasized in it the logical harmony, the sequence of dialectical materialism. Lenin showed, and further development of natural science confirmed, that dialectical materialism is the only true philosophy of natural science, the most consistent and scientific method of thinking. Lenin’s work helped many progressive scientists to find the right way in their fields of knowledge, to break with idealistic philosophy, to move to the positions of a scientific, dialectical-materialistic worldview. Lenin's analysis of the development of natural science at the turn of the XIX-XX centuries , A deep philosophical generalization of the achievements of natural science , his description of the crisis of physics and the definition of a way out of it are of paramount importance for the fight against the modern idealistic falsification of scientific discoveries for the victory of dialectical materialism in natural science , for further progress in science.