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In the diffusion model, those who first recognize and adopt a new idea are called innovators. They are of prime importance. [140] They are often on the fringes of society, and launch the innovation, (in this case Christianity), into the social system from outside the system.
Migrationism explains cultural change in terms of human migration, while diffusionism relies on explanations based on trans-cultural diffusion of ideas rather than populations (pots, not people [1]). Western archaeology the first half of the 20th century relied on the assumption of migration and invasion as driving cultural change.
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.
In such a model, nodes represent agents (e.g. companies or organizations) and ties represent a connection between two entities (e.g. a company-client relationship or competitive relationship). Diffusion occurs when a novel idea, product, or process is implemented by an agent and permeates through these ties to others. [8]
A developmental model of the evolution of the mind, culture, and society was the result, paralleling the evolution of the human species: [23] "Modern savages [sic] became, in effect, living fossils left behind by the march of progress, relics of the Paleolithic still lingering on into the present."
The fifth edition (2003, with Nancy Singer Olaguera) addresses the spread of the Internet, and how it has transformed the way human beings communicate and adopt new ideas. Rogers proposes that adopters of any new innovation or idea can be categorized as innovators (2.5%), early adopters (13.5%), early majority (34%), late majority (34%) and ...
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The finding that "Mitochondrial Eve" was relatively recent and African seemed to give the upper hand to the proponents of the Out of Africa hypothesis.But in 2002, Alan Templeton published a genetic analysis involving other loci in the genome as well, and this showed that some variants that are present in modern populations existed already in Asia hundreds of thousands of years ago. [31]