I would imagine we'd copy civilization from places that weren't affected (e.g. parts of Africa). They should probably still retain knowledge up to quantum physi

I would imagine we'd copy civilization from places that weren't affected (e.g. parts of Africa). They should probably still retain knowledge up to quantum physics, dams, electric trains, microservices, tanks, agriculture, and all of TV Tropes. Maybe they'd be missing space travel, electric cars, and AI generated waifus but research wise it might just take half a century to get back to 2020 levels. For someone who is on ground zero, it sounds like the most useful thing would be to establish communication with unaffected areas for knowledge transfer.