As usual, right on the money.
The favorite term that leftists have had for themselves over the past couple of hundred years is "progressive."
They believe in progress, which as Hindraker remarks, always moves to the left.
Karl Marx elevated this thinking into a scientific principle. The inevitable march of progress would relegate religion and superstition and nobility and kingship and all the relics of the past to the "dustbin of history."
"Time marches on," as the newsreels used to say when Franklin Delano Roosevelt was president.
But the twentieth century revealed that progress is not inevitable, that Communism was history's bloodiest failure, and that the advancement of humanity to higher and higher levels was by no means inevitable. In fact, postmodernism has abandoned those old ideas of progress, but somehow has adopted the marxist vision to new cultural systems.
Incidentally, I hesitate to mention it, but Darwin played no small role in this credulous belief in everlasting progress, onward and upward. It is no coincidence that our imperial courts are anxious to impose Darwin on our children at the same time that they outlaw relgion from our schools.
I wonder if they include 'Brokeback Mountain' as part of that advancement?