Man Moves Huge Blocks!
Comment: I've read other explanations of how ancient people built the pyramids and raised the stones at Stonehenge and the moai on Easter Island. I think these explanations involved related but different techniques. And of course the ancients could've used levers and pulleys, since I doubt these methods were totally unknown.
In short, the von Däniken/Spielberg theory that "primitive" people needed extraterrestrial help to build large monuments is flatly wrong.
For more on the subject, see Indiana Jones and the Stereotypes of Doom.