If your definition of leftism is "progressive" then I'm sorry to tell you: all advances in art were made by people you'd consider "leftists".

There is simply no way that a conservative worldview brings any art form forward, not even from classically-inspired backgrounds, by pure definition it attempts to keep the status quo, and all they achieve is a soulless repetition of what art was from the period they considered as "golden".

Not much dissimilar to what you are trying to do, to be honest.

I'm not sure if you realized, but you are not any kind of intellectual authority in any matter related to art. The idea that all artists are leftist is just imbecile, to say the least.

You are just part - probably only a satellite - of the self pleasing circle of modern art critics that ultimately live on the backs of the working man.

People that write stuff like this about a urinal on a wall:

"Arensberg had referred to a 'lovely form' and it does not take much stretching of the imagination to see in the upside-down urinal's gently flowing curves the veiled head of a classic Renaissance Madonna or a seated Buddha or, perhaps more to the point, one of Brâncuși's polished erotic forms."