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The main argument of this book is that differences between societies can be ultimately explained by geographical factors.
The four main sets of geographical determinants are:
- Continental differences in the wild plant and animal species available as starting materials for domestication.
- Those affecting rates of diffusion and migration, which differed greatly among continents. They were most rapid in Eurasia, because of its east–west major axis and its relatively modest ecological and geographica ...more
The four main sets of geographical determinants are:
- Continental differences in the wild plant and animal species available as starting materials for domestication.
- Those affecting rates of diffusion and migration, which differed greatly among continents. They were most rapid in Eurasia, because of its east–west major axis and its relatively modest ecological and geographica ...more

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