I'd say that the Progressive movement of the early 20th century and the Progressive movement of the early 21st really aren't any more similar than you'd expect any two randomly selected political groups to be.
I didn't capitalize "progressive" very intentionally. And further, I am not talking about merely the 20th century, but also the 19th, the 18th, and the 17th.
http://www.amazon.com/Liberalism-Counter-History-Domenico-Lo...