The NEWSWEEK 50: Eric Schmidt, Google

He runs the most powerful company on the Internet. He's an adviser to the president-elect and was a front runner for the position of national chief technology officer before announcing that he wants to remain in the private sector. Google's success derives almost entirely from ads that appear next to search results when you type a word or term into the Google search engine; because these offer a measurable return, they should weather the downturn better than other forms of online ads. Indeed, Google's biggest problem is that some people worry the company has grown too strong. As problems go, that's a good one to have.