Who attributed the similarity of prehistoric tools all over the world to diffusion rather than independent origin?

The anthropologist who attributed the similarity of prehistoric tools all over the world to diffusion rather than independent origin was Grafton Elliot Smith. He was a prominent figure in the field of anthropology during the late 19th and early 20th centuries and was associated with the British diffusionist school of thought. Smith argued that the widespread distribution of similar types of tools and artifacts found in different regions could be best explained by the diffusion of cultural traits from a few centers of innovation to other parts of the world. This perspective contrasted with theories proposing independent invention or parallel evolution as the primary drivers of cultural similarities. Smith's ideas contributed to the development of diffusionist theories in anthropology and influenced subsequent scholars' interpretations of cultural diffusion.