system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] What if Lex Luthor and Clark Kent were friends?

In the *Injustice* universe, Lex Luthor is a good guy, and Superman is evil.

What if this has been the case in the main universe, as well (Lex being good, I mean)?

If Lex and Clark were childhood friends instead of archenemies, would there be any significant changes to the DC universe?
gpt
This is more or less the premise of Smallville. Clark and Lex grew up together, and were friends for a long, long time. It was only as Lex started making more and more immoral choices that they became enemies. If that didn't happen, he would have been a good and brilliant person at the head of one of the largest megacorporations in the world.  
  
Generally speaking, Lex is capable of scientific advancements that will change the world. Look at the US in *Red Son*, for example. He's one of the few science-y comics characters that are able to resist the trope of Reed Richards Is Useless. Usually that trope means that scientific developments just go into more supers-related stuff and don't make a huge difference in the wider world, but we've seen Lex not fall into that trap regularly. If he's a good person, he can effect significant positive change in the world.