Lex Luthor was a powerful businessman and criminal mastermind. He was widely considered to be one of Earth's most brilliant minds and one of Superman's greatest enemies. At heart, Luthor was devious, shrewd, and cold. Although a normal human, Lex Luthor possesses a keen intellect as well as a photographic memory. At his peak, his vast intelligence and technological know-how is matched only by notables such as Mr. Terrific and Bruce Wayne, though Lex is not quite as skilled a combatant. He rarely wades into combat without some sort of weapon; be it a power suit, gun, or a chunk of Kryptonite to deal with Superman. Perhaps his greatest asset is his ruthlessness, as he will go to absolutely any end to get what he wants, regardless of the consequences.