Cultural-historical psychology is a branch of psychological theory and practice associated with Lev Vygotsky and Alexander Luria and their Circle, who initiated it in the mid-1920s–1930s. The phrase "cultural-historical psychology" never occurs in the writings of Vygotsky, and was subsequently ascribed to him by his critics and followers alike, yet it is under this title that this intellectual movement is now widely known. The main goal of Vygotsky-Luria project was the establishment of a "new psychology" that would account for the inseparable unity of mind, brain and culture in their development (and/or degradation) in concrete socio-historical settings (in case of individuals) and throughout the history of humankind as socio-biological species.