Pissarro's Peasants Resting (1881). 
 
 
 
An older definition of Middle Class....
 

Those between the nobility and peasantry.

 
Although that, I suppose, would make peasants the same as today's working class. And today's working class would have to be defined as people who work, rather than people who have the temerity to have a mortgage they can't afford.
 
Ah! The joys of capitalism and modern public relations....