Zusammenfassung
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.

Inhalt
Some Major Themes in Vygotsky's Theoretical Work. An Introduction.- On Vygotsky's Creative Development.- 1: Problems of the Theory and Methods of Psychology.- 1: The Methods of Reflexological and Psychological Investigation.- 2: Preface to Lazursky.- 3: Consciousness as a Problem for the Psychology of Behavior.- 4: Apropos Koffka's Article on Self-Observation (Instead of a Preface).- 5: The Instrumental Method in Psychology.- 6: On Psychological Systems.- 7: Mind, Consciousness, the Unconscious.- 8: Preface to Leont'ev.- 9: The Problem of Consciousness.- 10: Psychology and the Theory of Localization of Mental Functions.- 2: Developmental Paths of Psychological Knowledge.- 11: Preface to Thorndike.- 12: Preface to Bühler.- 13: Preface to Köhler.- 14: Preface to Koffka.- 15: The Historical Meaning of the Crisis in Psychology: A Methodological Investigation.- Epilogue.- Notes to the English Edition.- Notes to the Russian Edition.- References.- Author Index.