All very full of conscience Al, but your point was that the English were forced to move out of economic circumstance, so that the localised forms became diffused. That applies equally to the other cultures I mentioned, if not more so.

I don't think you'll find a more socially inclusive and left-leaning world than folk. At the folk ale I went to this weekend just past, I did a couple of socialist songs, and it transpired that the host side included 9 current or ex shop stewards. Your assertion that the folk movement (if there is such a thing) holds its nose when the working class appear is, I think, simply wrong.