The US has used its power to undermine the sovereignty of other nations, often through coercion and violence.  As Samuel P. Huntington has written, the US suffers from “benign hegemon syndrome.”[19] Its self-perception as an exceptional, virtuous superpower is at odds with the violent history of its foreign policy. Since the end of World War II, it has sought to overthrow over forty governments, and to destroy numerous populist-nationalist movements.[20] Its interventions in other countries have substantially increased following the end of the Cold War and the absence of a rival power balancing against it; one study has shown a 60% increase with an average of two interventions per year.[21] In addition, the US often interferes in the internal affairs of other countries; including through perverting elections, applying sanctions to change behaviour or influence domestic politics, propping up opposition forces, and even trying to assassinate foreign leaders (for example, Fidel Castro and more recently, arguably, Colonel Gaddafi). Therefore, while it may see itself as a benign hegemon, many see America as a rogue superpower.  [19] Huntington, Samuel P. (1999), ‘The Lonely Superpower’, Foreign Affairs, March/April 1999.  , Accessed 17th May, 2011.  [20] Blum, William (2002). Rogue State: A Guide to the World’s Only Superpower (London).  [21] In Sardar, Ziauddin and Merryl Wyn Davies (2003), Why Do People Hate America? (Cambridge: Icon Books Ltd.), pp. 67-68.