(This is my definition)
Generally, ordinary people are supposed to be 'lifted-up', and brought to a better place in life (even if they don't want to go to your place, and would prefer you not to lift them).
Somehow in this vision....you can see some 'enchanted' place where life is better and you know the path to reach it. You are going from a uncivilized society (in your vision) to a civilized society.
How do you go from 'A' to 'B'? Well, you use technology, economic development, various organizations (some are created out of thin air), science, and general BULLSHIT chatter (propaganda or just plain lies).
Somewhere in this discussion, there is always some form of inequality. It might be financial, racial, status, job opportunity, political in nature, sexual, or even religious/faith situations.
In simple terms, if you go back to the 1700s and view all of the progressive attempts in societies across the US and Europe....it was always two steps forward, and one step back. Most people came to view progressive changes as necessary, and then wake up months or years later to grasp that it was a success/failure formula.
Selling it in today's atmosphere? As long as you believe that you fall into a inequality 'pit', and you need someone to 'lift' you out....then you are for progressive resolutions. If you aren't identifying as a loser in this mess....then you probably aren't pro-progressive.
The fact that most all acts of progressive 'repairs' cost something? Well...this is the tough pill to swallow. There's a price-tag on each repair and you might want to ask about this ahead of time.
Selling progressive resolutions to skeptical people? It doesn't work. This is the chief weakness of the concept, and you can't get past this point.
As for the current trend to run it's path and be stopped at some key point? More than likely, but it's always a twist of 'entertainment' and frankly....all that progressive stuff from the 1970s/1980s....have stalled out. We need fresh fake stuff to entertain ourselves today.