Age: 64
Occupation: Secretary of State
Now in her last year at State, Clinton is breaking travel records, pioneering new partnerships and getting everyone from entry-level officers to ambassadors tweeting. Critics say it's naive to think technologies like social media could rival power relations in steering events. But from the First Lady's office to her current one, Clinton is an expert at finding creative ways to maximize limited power. And she's not done cracking the glass ceiling: she's working on unprecedented investments in women's programs.