[falcolas]

Tiny nit: generations are measured in 20 or 25 year increments, an "average" of how long it takes one group of humans to grow up and begin reproducing themselves. I've found that the media tends to use 20 year increments, even though 25 is a bit more accurate for an "average time for two people to have two children".

This would change your figures to around 2 generations for the current automation revolution, and industrialization to between 4-6 generations.

[AndrewKemendo]

Thanks for that. I wrestled with using generational vs life span for that exact reason, but decided it was pedantic and not worth going into. So thanks for doing that math for me :)