Just because John Steinbeck said something, doesn't make it relevant.
The Grapes of Wrath is so over the top and exaggerated it might as well be a comic book.
Socialism had it's shot in this country. It blew it for a massive host of reasons. Hell it appeared on the scene at the perfect time two: the two major parties were fracturing and the Republicans had schismed. They had the window of opportunity, but couldn't seize it.