Is this falsifiable?
Sure, just step back in time.
A bit less than two millenia ago one could have said "Effectively there's a position -- that Jesus gifted eternal life to humanity -- that's obviously correct but there are also people who are just too hidebound and change averse to recognize it and progress can't be made until they die off. But progress will be made because the position is correct."
I was actually thinking of eugenics, which was once a progressivist "obvious correct thing where we just need to wait until these luddites die off until everything will be great" thing, until it wasn't. Incidentally a counterexample to "Cthulhu always swims left" too.
It's a case where "correct", "right side of history" and "progress" dissociate from each other.
Another month has passed and here is a new rationality quotes thread. The usual rules are:
And one new rule: