as far as I'm aware, we have no idea other than that they didn't do much at one time. we can only deduce little modifications were done semi-regularly by the ancient pre-historic version of open source contributors. they had to lift 10+ ton limestone blocks and move them into place. but there's ample evidence of them trying to lift those blocks out of the quarry and failing, thus leaving behind broken would-be pillars of limestone for 12,000 years. the best assumption is just that they had tons of wild cereals and gazelle to munch on so these people were able to work on this persistently over many generations. they had no social hierarchy or need for labor at all, so they had all the free time in the world to use stone age tools to build structures that rivaled the greeks 9,000 years later
