I think it started before RvW. the environment was there before the USSC decision. I think it started before FDR - and that it started from within the dem party, yet is not confined there, for JFK wasn't exactly liberal in his policies nor ecopnomics - he is actually the father of supply-side economics, dubbed reagonomics by the press.
You may be right, but I am not really educated in political history. I only know what I have seen since I started paying attention in the 1980 election. I was a grand 9 years old then, and life was wonderful...no worries!