Mainly because "progressivism" as the term is used today has little to do with what it was about in the past? Most movements have had huge changes over the past hundred years.
It wasn't exactly conservatism which brought us back to the point we're at now from there, was it? It seems as if it were a different movement entirely from the late 1800s progressives and the conservative movement.
It wasn't exactly conservatism which brought us back to the point we're at now from there, was it? It seems as if it were a different movement entirely from the late 1800s progressives and the conservative movement.