7. ACTION COMICS #58 (1943)During America’s involvement in WWII, Superman became a propaganda mascot. Action Comics covers would routinely showcase the Man of Steel destroying Nazi tanks, grounding Japanese fighter planes, and chumming it up with FDR.
And while the phrase “Slap a Jap” may seem tasteless now, it’s a hugely important and memorable aspect of Superman’s history. This is a seminal cover during a time of both great global unrest and American unity.
Thankfully, comics have since smartened up about this sort of stuff and chances are you’ll never see Superman landing a haymaker on Muammar Gaddafi.