The common origin and other arguments supporting the view of dispersal involved, to an extent, both creation and dispersal. The argument which Boas raised against psychic connectivity was, like Mason, historically based. He pointed out that not one invention was ever the same in different societies and cultures. Accordingly, it took on different forms in each, similar but not identical. How did variety come about then? Dispersal was not simply “mechanical additions” or imitation (1924, Boas: 344) but was of itself an invention. A “stimulus for original inner development” that produced new “unique …show more content…
Due to the psychology, techniques, and history of the society, however, these were often limited. A “pattern that was general allowed for change to be directed, whilst it limited deviation” – it was, however, “wide enough to allow for individual variations” (1945, Herkovits: 162-63). Convergence advocates presented it as being historical fact, with some critics arguing that convergence was challenging to diffusion as: “in effect, it said that a quality could be be distributed due to phenomena that did not involve dispersal” (1923, Wissler: