Interesting read, inventors are connected in 18th century UK and crisis spur innovation based on inventions invented before, independently from new needs brought about by crisis

https://antonhowes.substack.com/p/age-of-invention-upstream-downstream

On this issue, invention and innovation I just read the introduction to the book The lever of Riches by Joel Mokyr

Inventors goes to the US and create growth, Twitter 3d https://mobile.twitter.com/calebwatney/status/1354095703467941893

A chart of inventor balance in the 10s