This process describes the spread of a trend or idea from persons or nodes of authority or power to other persons or places. Typically, this involves the dissemination of innovations downward through an established hierarchy. A classic example is fashion trends often originating in major global cities like Paris or New York before diffusing to regional hubs and eventually smaller towns and rural areas.
Understanding this type of spatial propagation is crucial for analyzing cultural, economic, and political patterns across geographical space. Recognizing the hierarchical structure through which innovations spread helps to identify key influencers and understand the dynamics of globalization. Historically, this type of diffusion has played a significant role in the spread of technology, political ideologies, and even languages.