At the beginning of 20th century, there was a problem of establishing which version of the association of Kant's and Marx's ideas is correct. If some Legal Marxists more or less combined Kant and Marx, most Russian Social Democrats, especially Bolsheviks, were against such an association. Under the influence of G. V. Plekhanov, Russian Marxists announced a sharply critical attitude toward Kant's philosophy. This position was reinforced by Russian philosophers, poets, and slavophiles who accused Kant of being militarist. During the World War I, both tendencies faced each other. Plekhanov's desperate appeal to "the simple laws or morals and justice" and Kant's "Critique of Practical Reason", which was supported by L. I. Axelrod, failed. It was rejected by the majority of Marxists both during the World War I and after the triumph of the 1917 October Revolution.