Can anyone come up with a good analogy with the American Progressive Movement?

Question

I have : The Progressive Movement is to the United States as ____ is to ______. Need help!!

Answer 1

The Progressive Movement is to the United States as The Radical movement was to Britain.

Both movements were broad attempts at societal reform in Britain or the United States, so I think it's a pretty good analogy. For other options, check the Wikipedia link below: