^McBrearty, Sally; Brooks, Allison. The revolution that wasn't: a new interpretation of the origin of modern human behavior. Journal of Human Evolution. 2000, 39 (5): 453–563. Bibcode:2000JHumE..39..453M. PMID 11102266. doi:10.1006/jhev.2000.0435. Proponents of the model known as the 'human revolution' claim that modern human behaviors arose suddenly, and nearly simultaneously, throughout the Old World ca. 40–50 ka. [...] In fact, many of the components of the 'human revolution' claimed to appear at 40–50 ka are found in the African Middle Stone Age tens of thousands of years earlier. These features include blade and microlithic technology, bone tools, increased geographic range, specialized hunting, the use of aquatic resources, long distance trade, systematic processing and use of pigment, and art and decoration.
^Henshilwood, Christopher; Marean, Curtis. The Origin of Modern Human Behavior: Critique of the Models and Their Test Implications. Current Anthropology. 2003, 44 (5): 627–651. PMID 14971366. S2CID 11081605. doi:10.1086/377665.