Hi Nigel
Of course I accept the fact that dragging becomes easier as the size of the workforce increases.
The question is: What size of workforce did the Neolithic people who built Stonehenge have available?
The population of the whole of Britain at that time is estimated to have been in the region of perhaps 300,000. Furthermore these people were spread thinly from Lands End to John O Groats and beyond. The only form of transport was walking.
In the international version of Foamhenge the production company included some footage of the natives on the island of West Sumba in Indonesia dragging a large stone. (Perhaps 15 to 20 tons)We were informed that 600 people took part. During the whole of one day this stone was dragged just 100 yards. Watching the piece of film they seemed to be moving this stone at quite a pace, almost running. Yet at the end of the day they had succeeded in moving it only 100 yards.
Until someone demonstrates that a forty-ton stone can be dragged for a credible distance using a workforce estimated to have been available to the builders of Stonehenge. I will continue my research. And by demonstrate I don't mean dragging a stone for twenty minutes and then multiplying distance covered by the time available.