Ethnic Technology
It is puzzling why a particular technology does not spread everywhere throughout the world once invented. Why didn’t the plow, for instance, or backstrap looms, or the buttress arch, or any number of thousands of ancient inventions spread to all parts of the world once they had been refined? If they were truly advantageous, why would not their benefits ripple through a culture at the speed of news? After a century or two, any worthwhile invention should be able to cross a mountain or valley. We know from archeological remains that trade moved steadily, while innovations did not. Instead the spread of technology has always been uneven, even among places with similar resources, geography, climate and culture. It is very common for an innovation to be held up in one place and not cross into another region even as other innovations overtake it on the same route. It is almost as if technology had an ethnic dimension.
Anthropologist Pierre Petrequin once noted that the Meervlakte Dubele and Iau tribes in Papau New Guinea had been using steel axes and beads for many decades but their use had not been adopted by the Wanos tribe a “mere day’s walk away.”
