I become more convinced that the period of the Industrial Revolution and particularly around London holds some valuable clues. First, the typical image of a PWP of that era is NOT the same image of today. The victim of that time "turned to stone". Thanks to ldopa, those of our era end up dancing and jerking around. Yet, most talk in terms of references to tremor in ancient texts as evidence of an equally aged origin for PD. If I may slip into my "Spock" persona a moment: "Highly illogical, Captain."

A lot of things happened during that period. A veritable tsunami of change and all centered on London. And we all know that we PWPs thrive on change, don't we?

Among the changes was the introduction of artificial light and the night shift workforce. For the first time there were people who never saw blue sky nor felt the sun upon their skin.