Isn't it lovely to think of those magical days of British Prehistory when communities through some communal 'hippy happy' congenial ethos decided to construct giant monuments for reasons that we don't now understand?
Wasn't it so much fun?
I don't imagine so!
They were no doubt, in reality, built by forced labour procured by tyrannical dynasties, that we have no historical evidence apart from the obvious evidence from their resulting monuments.
I can hardly believe that Silbury Hill was ever concieved by a bunch of commune loving happy hippy neolithic types to go ahead and spend fantasic amounts of energy on constructing the thing when everyday needs would have prevailed in preference.
From my perspective the entire megalithic/massive earthwork landscape of the Neolithic/Bronze Age even to the Iron Age shouts......social enslavement!