28 O'NEILL, S., “The Promise and Perils of South American Integration”, World Politics Review, 12 January 2009. Available at http://www.worldpoliticsreview.com/article.aspx?id=3148 (date accessed: 10 May 2010) Furthermore, regional integration reduces ideological differences among the implied countries and contributes decisively to create a structural peace. This would be clearly beneficial for South America and for the U.S.
29 The letter sent on January 19, 2010 by the U.S. Secretary of State Hillary Clinton to UNASUR ProTempore President Rafael Correa seems to go in this sense. See Embassy of Ecuador, Washington, DC, “U.S. agrees to open dialogue with South American nations”, 21 January 2010. Available at http://www.ecuador.org/blog/?p=613 (date accessed: 10 May 2010).