system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Is there anything that lex luthor is legitimately scared of?

We know that lex luthor is the picture of confidence ( with a healthy dose of arrogance) and seems to be fearless most of the time. However there has to be something that he’s afraid of right?
gpt
In terms of concrete fears like a monster or a specific person that traumatized him, not really. 

Luthor's fears are more complex, but they're also at the core of his personality, which he shields with his arrogance and aura of confidence. Above all, he's terrified of being forgotten by history. Being seen as something lesser than the foremost human intellect and paragon of his species. Losing power, or at least being made powerless. 

Wouldn't you know it, Superman represents literally all of those things according to his world view. He's not cowering in fear at Superman or anything, but he is terrified that in the grand scheme of history, people will remember this time as the "Superman era" and not the "Luthor era".