So for many years when I first began to learn more about Superman there has been one thing I've encountered time and time again which the more I learn seems more and more strange. This weird connection some see between Norman Rockwell who was an American Artist who often painted very serene and idyllic pictures of American life and Superman who at the smallest building block is about spending great energy to fight evil.
Rockwell's general high point is considered to be around the 30's 40's which is right around the time Superman was coming in to be and what's going on in Rockwell's art and what's happening in the pages of Superman are showing two very different views of the world and American life. Rockwell is depicting a very rosy view of what America could be like and Superman is depicting the hard times and the problems that the little guy was suffering. They're frankly the polar opposites that modern comics try to make Batman and Superman, they have little in common imo besides presumed time setting.