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8. Expansion & Interconnection
Early humans had pretty small social networks. At most, they probably met only a couple hundred people who probably all lived very similar lives to their own. As people started farming, these networks got larger. People were increasingly specialized in their work and trade. Populations in cities got larger. Trade reached across longer distances, bringing together people with very different lives and ways of thinking.
All content in “8. Expansion & Interconnection”


Up to this point, the world was divided into four separate world zones. Changes in the weather and technology as well as a growing population pushed humans to expand into new areas.

8.1—Exploration & Interconnection

As people started to move across longer distances, they met others whose lives, foods, and ideas were different from their own. This began the process of interconnection that continues even now.


Review Big History vocabulary and take the Glossary Challenge.


Download the teacher resources from the Big History Project classroom version of this course. Text transcripts for videos are also available.