Carlos Slim Helu

Carlos Slim Helu retains the title of world's richest man for the third year in a row despite a fortune that's $5 billion smaller than a year ago-primarily ­because of a lower share price for telecom giant America Movil, which accounts for more than half his net worth. In April the company was fined $1 billion by Mexican regulators for monopolistic practices, but is appealing the decision. Slim is spending more time working with his Carlos Slim Foundation and the Telmex Foundation than he has in the past. His goal: philanthropic work that develops human capacity.