4. Vladimir Putin
Title: Prime Minister
Country of citizenship: Russia
Prime Minister still more powerful than his handpicked head-of-state, President Dmitry Medvedev. Former KGB officer will likely replace protégé in 2012. In the meantime, has final say over one-ninth of Earth's land area, vast energy and mineral resources. Declared nuclear power has veto on U.N.'s Security Council. Russian government agency reported to have already registered web address Putin-2012.rf. On running again: "The president of the United States, Roosevelt, was elected four times in a row because it did not contradict the American Constitution" (September 2010).
(AP Photo/RIA Novosti,Alexei Druzhinin)