Presents a theoretical work originally written in the 1920s, long believed to be lost, by a Soviet psychologist. He responds to the proliferation of different schools within the field with the formulation of a unified theory based on Marxism. For scholars in psychology and the history of psychology. Annotation c. by Book News, Inc., Portland, Or. | The Collected Works of L. S. Vygotsky by L. S. Vygotsky, Hardcover | Indigo Chapters | The Collected Works of L. S. Vygotsky by L.S. Vygotsky, Hardcover | Indigo Chapters