Main Question or Discussion Point
I'm not averse to the theories that neolithic people might have used grooved timbers and stones as "ball-bearings", but there is a glaring problem with their analysis. The group got men and women to push on the load to try to get it going along its track. Once the loads were moving, they could be kept moving quite easily, but there were definite limits to getting the loads started. Why didn't these "smart" people figure out that if you had some people with long levers, all striving to get the load moving, that the people pushing and pulling the load could use its momentum to help keep it moving?