advancement of civilization? Like many things in life, "progress" is relative.
Also, civilization does not "move" in a linear way. If you think it does, please explain how barbarian invasions of Europe in the 4th-6th centuries advanced civilization.
You are using one example, that are far more examples one can use to dismiss your claim
Without the progressive era, we would still be working 14 hour work days
They are doing that to avoid being called Marxist and Communists They figure if they call themselves progressives it will divert attention from what they really are