Steve Rogers has always been socially progressive–his attitude towards Sam Wilson [the Falcon] might seem patronizing to modern audiences, but for someone born in 1917, Steve Rogers is pretty damned enlightened. He seems to have been working-class; there’s no real mention of an inheritance anywhere in his background, and he’s had to take jobs to make ends meet on several occasions. And he’s very strongly anti-Fascist; it’s telling that he signed up to fight against Hitler a year before the United States’ entry into the war…and was passionate enough about it that he wouldn’t take 4F for an answer.
All those things add up to a very interesting, potentially shocking, probably fascinating backstory that’s never been touched on. Namely, that Steve Rogers probably grew up in a Communist household. He might not have been a card-carrying Communist himself, but his parents almost certainly were. Because being a Communist had a different meaning during the Great Depression than it did twenty years onwards, in a Cold War America. During the 1930s, when unemployment was high and a privileged few were almost completely insulated from the Depression’s effects, lots of people joined the Communists because they believed in things like unionization, racial equality, and fighting back against the rise of totalitarian dictatorships in Europe.