@papinacho: you're wrong, Lex is supposed to represent the best humanity has to offer, but he is misguided. Superman's job is to inspire us to do better; his ultimate challenge is to inspire Lex to be better. Red Son's Lex, regardless of his motivation, still lived up to his potential and ushered humanity into a golden age and ended human struggle due to his interaction with Superman.
That's why I don't like when people compare Bruce to Lex, they're not even in the same league.
@papinacho: remember that Lex was a criminal until he realized that, to beat Superman, he had to fight Superman on Superman's terms. Lex's America was able to rival the United Soviet Superman Republic when he started his reforms. Once Superman realized that his intervention was doing more harm than good, he turned to the mind of Luthor so that mankind could shape its own destiny.
Superman inspired Luthor in an indirect manner and inspired others directly in USSR, but this is opposite Superman. Regular Superman would've inspired Lex akin to All-Star (a more direct manner) and people through his examples.
@papinacho: in All-Star, Lex has a change of character moment too. Superman's journey is over when he can inspire the worst of us--Lex Luthor--to realize his potential and use his gift to better the world.