Cultural Hearths and Diffusion
A cultural hearth is the origin point of a trait, such as agriculture in the Fertile Crescent or writing in Mesopotamia. Independent invention proves traits arise separately, defeating racist diffusionist myths.
From hearths, ideas spread via specific mechanisms:
| Type | Mechanism | Signature |
|---|---|---|
| Relocation | People physically carry it | Gap between origin and destination |
| Contagious | Spreads to adjacent nodes | Ink-blot, distance-decay |
| Hierarchical | Jumps down a settlement hierarchy | Big cities first, countryside last |
| Stimulus | The idea travels, form is rebuilt | Same concept, unrelated execution |
Hierarchical diffusion defeats spatial intuition, hitting large nodes before adjacent villages. Stimulus diffusion is subtler: Sequoyah saw English writing and invented an independent Cherokee syllabary.
Reception and Landscape
Nothing diffuses unchanged. Adoption is a negotiation, featuring:
- Syncretism: Arriving traits are reworked to fit existing structures, like local saints predating churches.
- Selective adoption: Societies take tools while rejecting foreign theology.
- Rejection: Tokugawa Japan banned firearms for two centuries because they threatened social order.
Carl Sauer's formulation: Culture is the agent, the natural area is the medium, and the cultural landscape is the result.
The cultural landscape is a permanent text. Street plans outlive the states that drew them, revealing colonial administrations from centuries past.