Lex Luthor is the archenemy of Superman and one of the most prominent supervillains in the Superman Universe - he is often portrayed as a bald businessman or scientist (often a mix of both) and fights the Man Of Steel not with brute strength but with his formidable mind, Lex Luthor is easily one of the DC Universe's most intelligent human criminals and is rarely caught unawares although like many supervillains he has been known to let his own arrogance blind him on a few occassions.