There weren’t many great inventors to begin with. [Great man theory](https://en.wikipedia.org/wiki/Great_man_theory) is bullshit. Instead people incrementally improve upon previous discoveries. That’s how various countries claim firsts, they get tricky with the definition. The Wright brothers were far from the to built planes, Edison only found a new filament and (analog) computers go back two millennia.
Beyond that, education and population numbers increased to a degree that [multiple discovery](https://en.wikipedia.org/wiki/Multiple_discovery) (people make the same discoveries independently) has become a “problem” for the Nobel committee.
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