| web | https://theconversation.com/the-horse-bit-and-bridle-kicked-off-ancient-empires-a-new-giant-dataset-tracks-the-societal-factors-that-drove-military-technology-170073 |
| author | Peter Turchin |
| publication | The Conversation |
| date | 2021-10-21 |
| web | Peter Turchin, Daniel Hoyer | PLOS One | 2021-10-20 |
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