Years ago, I bought a folder from Boots with a cover of William Morris designs including this print. I hadn't really thought about the print until someone asked me about it and I Googled it. The print was from 1888 and called John Ball's Dream.
How right he was then. How true it is today as it was in the 14th century. Except that those who think of themselves as being in "power" now wouldn't be able to execute anyone who agreed with what John had preached.