Empiriomonism is Alexander Bogdanov's scientific-philosophical substantiation of Marxism. In Books One and Two, he combines Ernst Mach's and Richard Avenarius's neutral monist philosophy with the theory of psychophysical parallelism and systematically demonstrates that human psyches are thoroughly natural and are subject to nature's laws. In Book Three, Bogdanov argues that empiriomonism is superior to G. V. Plekhanov's outdated materialism...