Mach's original training was as a physicist. He was well read in philosophy, especially Hume and Berkeley, who appealed to sense data and common sense over metaphysical speculation over whether the world was ultimately made of mind or matter. Mach attempted to reduce all scientific and practical concepts including time, and knowing subjects to experiential field of sense data. He rejected as metaphysical and unscientific all forms not grounded in experience. Matter and mind are all derived concepts. The only thing we know directly is experience and all experience consists in sensations. Both objects and subjects are built from sensations. For Mach, the physical and psychical world consist of the same elements, only in a different arrangement. Mach accepted the external world as real, but he felt that the distinction between physics and psychic distinction of materialism was unnecessary metaphysics. His insistence on starting from sense data was done for methodological reasons within science. he attempted to give methodological priority to positivism's epistemology over its ontology.
But if matter and mind are never discussed independent of experience, there is a danger that the external world could be theorized as:
- an unknowable thing in itself;
- a spiritual idealist world; and
- a world having no existence at all apart from the knowing subject.
As Pannekoek says:
Yet there is a certain ambiguity in Mach's expression on the outer world revealing a manifest propensity towards subjectivism, corresponding to the general mystical turn in the capitalist world. (106")
Lenin's defense of materialism
Lenin understood very well that materialism had to be defended against mystical interpretations, and this is what he set out to do in his Materialism and Empirio-Criticism, which he wrote in 1909. He understood that the old deterministic nature of materialism based on the five senses was now a relative, not absolute distinction, depending on the level of reality being dealt. He also had to make sense of the fact that matter and energy was convertible. How can you be a materialist when a physicist is dealing with energy, not matter? How do you answer mystical claims that matter has disappeared?
Lenin argued that what matters for materialism is not what the ultimate building block is. What matters is that matter and nature is independent of consciousness. Lenin maintained that the mind makes copies of reality (his theory of reflection) but this copy theory does not mean we have certain knowledge of the world or that mistakes and vagueness cannot occur in our knowing. He just meant that most of the time our copies of reality are good enough to have helped us survive. Lenin felt that the copy theory of the mind was the only out from mysticism.
Pannekoek argues:
Mach's opinion that causes and effect as well as natural laws do not factually exist in nature but are man-made expressions of observed regularities is said by Lenin to be identical with Kant" To deny the objective existence of these laws means that denial of nature itself. To make man the creator of natural laws means to him to make human mind the creator of the world. (129-130)
Unlike Mach, Lenin argued that the categories of Space and Time were real properties of the objective world and not simply categories of the human mind. Right or wrong, Lenin thought Mach's system was a rehash of Berkeley's subjective idealism. Lenin thought Mach confused the problem of the new properties of matter with the old problem of the theory of knowledge. He felt that Marxist philosophers needed to preserve the philosophical function performed by materialism from its scientific role in providing particular explanatory framework for natural phenomena.
Criticism of Lenin
Pannekoek says Lenin accepted Newton's model that there is absolute space and time. But Einstein refuted absolute time and space, which Lenin did not address. Further:
He identified the real objective world with physical matter. Electricity too is objective reality? Is it physical matter? Our sensation shows us light; is it reality but not matter? Photons cannot easily be denoted as a kind of matter. (137)
The problem with Lenin's copy theory is he gives no detailed discussion of how mental images copy physical objects, nor does he address the traditional objections to naà �ve realism. He has ignored more skeptical theories and even scientific epistemology about the limits of the mind that developed with Hume and Kant and beyond.
Sociohistorical nature of mind
In his rush to defend materialism from being attacked by mysticism, without realizing it, Lenin accepted the same subjective epistemological framework as mystics and mechanical materialists had about the starting point of the mind. The epistemological framework for mystics is with the relationship between a spiritual world and an individual. For mechanical materialists, the relationship is between nature the biological individual. Where mystics and mechanical materialists differ is in the ultimate nature of objective reality. For mystics the ultimate reality is the spiritual world. For mechanical materialists it is biophysical nature. But they agree that subjectivity begins with the individual. For Vygotsky and the sociohistorical school, in between the biophysical world and the individual mind is a sociohistorical layer of reality. It covers the earth the way the lithosphere and biosphere does. It is akin to Vernadsky and Chardin's noosphere. It is sociohistorical objectivity which engages in an expanding feedback loop with nature. Individual subjectivity emerges from and interacts with the historical-social layer of reality. The individual mind does not engage nature directly, only indirectly.
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