simple
The evidence seems to suggest that it is a bit of a mystery how they moved all those now heavy blocks
Well, are you suggesting that the value of the gravitational force was less back then simple? If so then the effects of a different value for the gravitational force has far reaching consequences. Perhaps you would care to give us the evidence you seem to think justifies asserting this claim?
(Of course there were laws in place to keep us from flying off the planet, etc, but whether identical to present gravity, I do not think we can know by science)
Hang on here. What do you mean "Of course"? You are making the claim that science can know nothing about gravity back then yet
you get to claim there were laws to keep us from flying off the planet? Those laws are just the ones we use to declare and define that there is gravity so what are you getting at exactly?
"A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
Albert Einstein