Vladimir Putin is the current leader of Russia. In Russia, Putin's leadership has mostly enjoyed considerable popularity, with generally high approval ratings. However, many of his actions have been characterised by the domestic opposition as undemocratic. Western observers and organisations have also voiced criticism of Putin's leadership. The 2011 Democracy Index stated that Russia has been in "a long process of regression [culminating] in a move from a hybrid to an authoritarian regime" under Putin, and American diplomatic cables leaked by WikiLeaks allege that Russia has become a "virtual mafia state" due to systematic corruption in Putin's governance. Some critics describe him as a dictator,allegations which Putin adamantly denies. Putin publicly projects an adventurous, macho image via taking part in unusual or dangerous activities; some of these publicity stunts have occasionally been criticised. A keen practitioner of martial arts, Putin has played a major role in the development of sport in Russia, notably, helping Sochi to win the bid for the 2014 Winter Olympics. Although many Russians assigns successes such as economic growth and stabilize the situation in the country and the restoration of Russian influence in the world.