[zdyn5]

What was the scale of academic research post WW 2 compared to now? I’d imagine our research budgets are a significantly higher fraction of GDP now.

[cma]

The fourth sector is still growing though:

https://en.m.wikipedia.org/wiki/Quaternary_sector_of_the_eco...

I don't see things going back towards the first and second sectors human labor wise, so it would have to all be taken up in the third sector (service sector)? I guess it is plausible with healthcare.