Editing Cultural diffusion (section)

==Types==
Five major types of cultural diffusion have been defined:
* Expansion diffusion: an innovation or idea that develops in a source area and remains strong there, while also spreading outward to other areas. This can include hierarchical, stimulus, and contagious diffusion.
* Relocation diffusion: an idea or innovation that migrates into new areas, leaving behind its origin or source of the cultural trait.
* Hierarchical diffusion: an idea or innovation that spreads by moving from larger to smaller places, often with little regard to the distance between places, and often influenced by social elites.
* Contagious diffusion: an idea or innovation that spreads based on person-to-person contact within a given population with no regard for hierarchies. HIV/AIDS first spread to urban neighborhoods (Hierarchical diffusion) and then spread outwards (contagious diffusion)<ref>{{cite book |last1=Domosh |first1=Mona |title=The Human Mosaic: A Cultural Approach to Human Geography |url=https://books.google.com/books?id=C79V2BKtKc0C&pg=PA10 |publisher=W.H. Freeman and Company |date=2013 |location=New York, NY |isbn=978-1-4292-4018-5 |pages=10–12 |edition=Twelfth}}</ref>
* Stimulus diffusion: an idea or innovation that spreads based on its attachment to another concept. Occurs when a certain idea is rejected but the underlying concept is adopted. Early Siberian people domesticated reindeer only after exposure to the domesticated cattle raised by cultures to their south. They had no use for cattle but the idea of domesticated herds appealed to them, and they began domesticating reindeer, an animal they had long hunted.<ref>{{cite book |last1=Domosh |first1=Mona |title=The Human Mosaic: A Cultural Approach to Human Geography |url=https://books.google.com/books?id=C79V2BKtKc0C&pg=PA12 |publisher=W.H. Freeman and Company |date=2013 |location=New York, NY |isbn=978-1-4292-4018-5 |page=12 |edition=Twelfth}}</ref>