The spread of ideas from one culture to another is referred to in human geographical studies as cultural diffusion. Diffusion occurs through the movement of people, goods, or ideas. Diffusion has been broken up into to separate categories by geographers, expansion diffusion and relocation diffusion. In the case of expansion diffusion, an innovation or idea develops in a source area and remains strong there , while also spreading outward. For example, Islam spread from its hearth …showed first 75 words of 478 total…

…showed last 75 words of 478 total…