What is diffusion?
(Sociology terms)

The sociological theory of diffusion is the study of the diffusion of innovations throughout social groups and organizations. The topic has seen rapid growth since the 1990s, reflecting curiosity about the process of social change and "fueled by interest in institutional arguments and in network and dynamic analysis."

Explanation:

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answer; early greeks were econimically stagnant and cut off from other near eastern civilizations;