You can get a lot of work done when there are no electronics to distract you.
Resident Cosplay Progressive
What else were they gonna do?
I like sandwiches
Ancient people weren't as dumb as you think, they were also motivated by the whip and/or were determined by spiritual reasons to see the project complete.
"In order to maintain a tolerant society, the society must be intolerant of intolerance." Paradox of tolerance
Well it's not like these things were built in a weekend. They took years, even decades to complete. Even if they only moved them inches an hour that's a whole lot of time and a whole lot of people working year round to get the job finished.
And the year round bit is the important aspect. Slave labor. No breaks and if they die throw em in a ditch and steal someone else's child to work on it.
Math is part of human civilization ever since we started building walls to protect cities and writing down taxes payments.