"We have gathered within the walls of the Communist Academy and are devoting this evening to Spinoza's memory not from the considerations which guided the organizers of the Hague celebration but from quite different considerations; for us Spinoza is essentially a great atheist and materialist. In this appraisal of Spinoza I am in complete agreement with Plekhanov. In all of Plekhanov's works, as I know, the fundamental thought is emphasized that Marxism, considered as a world‑view, is nothing other than a 'variety of Spinozism.' But I shall set this question aside for the moment, in order to cite a passage from Plekhanov's preface to my Introduction to Philosophy (the preface was written in 1914) in which he sharply criticizes the historians of philosophy who have numbered Spinoza among the idealists. 'With the present universal prevalence of idealism,' he says, 'it is quite natural that the history of philosophy should now be interpreted from the idealistic point of view. As a consequence, Spinoza his long since been numbered among the idealists. Hence, certain readers will probably be very much surprised to learn that I understand Spinoza in the materialistic sense; yet this is the only correct understanding of Spinozism. 'As early as 1843 Feuerbach asserted his fundamental conviction that the teaching of Spinoza was "an expression of the materialistic conceptions of the modern age." Of course, even Spinoza did not escape the influence of his time. His materialism, as Feuerbach remarked, was clothed in a theological costume, but the important thing was that, in any case, he eliminated the dualism of mind and nature. Nature in Spinoza is called God, but extension is one of the attributes of this God. And this constitutes the radical difference between Spinozism and idealism.'"