Knowledge moved from scarce to abundant
For most of human history, knowledge was trapped in individuals. Writing let it cross time. The printing press let it scale. The internet made it universal. Through all of these breakthroughs, one thing remained constant: a human being had to learn.
Organisations were built around this constraint. Hiring was the acquisition of knowledge. Training was its transfer. Management was its coordination. Scale required more people because more people meant access to more capability.
Every layer of hierarchy, every process, every coordination mechanism existed because the alternative — having a single person know and do everything — was not an option. The organisational machine was the solution to the problem of distributed knowledge.