Of course, history is only a muddle of facts and a fuddle of professors, and anyone who thinks it is one clear voice saying "Arise, sir Knight" deserves a life sentence in Camelot.
The 1930s - a Golden Age for American humor, mainly because everything else was going so badly. The wisecrack was the basic American sentence because there were so many things that could not be said any other way.
For now, I'm supposing that all movements are equal, which they're not, except in this respect: that none of them gives a damn about artists beyond their immediate utility. Good movements will use a writer just as ruthlessly as bad ones; since they all fancy they have better things to do than worry about one man's artistic survival.