. i would believe that the spear head would have most likely been first made in one small tribe by one person the traded and re-created and so most people use the same tools for the same reason but some places may not have the materials needed to make these tools there for some would have serton tools made of serton things compared to another place. some places had rocks and bone good for hard working tools like spear heads needles ect. wall others would have small trees, vines and wood good for making weapons, jewelerie and boats ect.
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