The romans had engineers and fire fighting crews. Nearly every society has had some kind of police/army/guard to enforce laws. Farmers actually opened the door to most other jobs/careers because people didn’t have to rely on themselves to grow or collect their own food which left more time to become an engineer, learn math, become a salesman or any other job that could be filled.
Sorry, why is cleaner #2 in the list?
Farmers, Engineers, Police/Fire/Ambulance, Teachers, etc…
Except for farmers humanity has gone quite a long time without them
Edit to clear up confusion about the wording: I meant that we need farmers, the rest not so much
The romans had engineers and fire fighting crews. Nearly every society has had some kind of police/army/guard to enforce laws. Farmers actually opened the door to most other jobs/careers because people didn’t have to rely on themselves to grow or collect their own food which left more time to become an engineer, learn math, become a salesman or any other job that could be filled.