Early 20th Century: Franz Boas has a profound influence on the emergence of the modern discipline of Anthropology. He helps develop the four field approach (Physical, Cultural, Linguistic, and Archaeology), and argues for a systematic methodology that rejects the biased and increasingly racist theories of Unilinear Evolution and Social Darwinism. He and his students begin collecting massive amounts of ethnographic and physical anthropological data in North America, systematically and scientifically refuting the notion of the inferiority and superiority of particular races. Boas advocates for an activist Anthropology engaging with the larger society, and personally fights vigerously against racism towards African Americans, being invited by W.E.B. Dubois to give the 1906 commencement address to Atlanta University. He also pushes for the tranformation of archaeology into a descriptive, not theorizing science after the sub-discipline's misuse by anthropologists following Morgan's unilinear evolutionary scheme. Boaz's view of the proper role of archaeology prevaled for decades, finally reversed by the emergence of the "New Archaeology" in the 1960's.