'These “Swiss Army knives” provide insight into the strength of social ties in a key period for human evolution.'
This article was originally published in The Conversation and has been republished under Creative Commons.
SOCIAL CONNECTION AND ADAPTATION Early humans weren’t always so connected. The first humans to leave Africa died out without this migratory success and without leaving any genetic trace among us today. To address this question, archaeologists examine tools and other human-made objects that still survive today. We assume that the people who made those objects, like people today, were social creatures who made objects with cultural meanings.SOCIAL CONNECTIVITY 65,000 YEARS AGO A small, common stone tool gave us an opportunity to test this idea in Southern Africa, during a period known as the Howiesons Poort around 65,000 years ago.
The fact they were all made to look so similar points to strong social connections between geographically distant groups across Southern Africa at this time. There is evidence the stone blades were often glued or bound to handles or shafts to make complex tools such as spears, knives, saws, scrapers, and drills, and used as tips and barbs for arrows. They were used to process plant materials, hides, feathers, and furs.
A STRONG SOCIAL NETWORK ADAPTED TO A CHANGING CLIMATE However, the production of this tool at this time cannot be seen as only a functional response to changing environmental conditions.
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