Host, The Rachel Maddow Show
If it feels as if Maddow has been going for years already, that's because she has. Her MSNBC show debuted in 2008, three years after she hosted a left-leaning political talkfest on the now defunct Air America Radio. Jon Stewart may catch more social media buzz, but only because the openly gay intellectual media maven is tougher, more substantive, and less silly. With the election nearly here, Maddow's ratings have spiked, often beating Fox News in her timeslot. And her new book, Drift, held No. 1 on the New York Times nonfiction bestseller list for five weeks this year.
Who are 2012's young business stars? We've got the CEO of a blue-chip beer brand, an airline CEO who just placed the largest order in commercial aviation history, and Warren Buffett's new prodigy, among the Silicon Valley hotshots and others.