1. Diffusion

2. Connections Between Places
Hearth
Place an innovation originates
Diffusion
Process by which a characteristic/ innovation spreads across space from one place to another
An idea, crop, artifact, good, language, etc
Types of diffusion
Relocation diffusion
Spread of a characteristic/ innovation through physical movement of people from one place to another
Ex. Language brought to a new locale by a migrant

3. Connections Between Places
Expansion Diffusion
Spread of a characteristic/ innovation from one place to another in an additive process (More people know about/use it)
Hierarchical diffusion
Spread from persons of authority or power to other persons or places (Leapfrogs people/areas)
Political leaders, socially elite people, other important people, or even from large urban areas
Contagious diffusion
Rapid, wavelike/widespread diffusion throughout the population
Diseases, items gone “viral” on the web are common
Stimulus Diffusion
Spread of an underlying principle even though a characteristic/innovation itself apparently fails to diffuse
Ex. Innovative features of Apple’s iPhone and iPad have been adopted by competitors
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