Australian mining tycoon Gina Rinehart is the world's richest woman, having made billions exporting iron ore. Still, her brash, bullying management style and her clumsy handling of the media makes her one of the most controversial subjects around. Still, no one can deny her success. "Is she an heiress? Inarguably. And yet she has, by hard work and guile and historic luck, multiplied the value of the business she inherited several hundred times over," William Finnegan writes.