There seems to be two conflicting narratives that have dominated DC Continuity in regards to this issue
The first one that was prevalent during Pre Crisis (Earth One) and Post Flashpoint continuity was Superman being the 'one who started it all' so to speak. He was the first superhero, and inspired all who come after him.
The second narrative that dominated Post Crisis continuity, was that Superman was not the first superhero, the JSA were, more or less, but Superman was the torchbearer of a new age of superheroism (the Silver Age, essentially.)
Now that I have laid the aforementioned out, which status quo do you prefer?
I have chosen not to post this thread in the Superman section of this forum as it is obvious the posters there have a bias in favor of a certain big, blue boy scout.