ABSTRACT
In the unpublished essay Vygotsky wrote in the late 1920s entitled "The historical meaning of the crisis in psychology: A methodological investigation", he conducted an extensive and intensive analysis of the methods used by leading schools of psychology. His conclusion was that as a science, psychology is fatally flawed because it is internally divided over the issue of methodology and, hence, basic philosophy. A major postulate of Vygotsky's theory is that the biologically inherited system of thinking and the culturally inherited system of speaking, which are initially separate systems in the life of a newborn, unite during infancy to form a new psychological activity: 'verbal thinking'. Inner speech is subvocalized, which means it is audible only to the speaker. In conclusion, there are sufficient formal parallels between the theories of Marx and Vygotsky to suggest that very similar philosophical approaches were used in their construction.
