Editors. "America declares its 'manifest destiny'". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=10905, accessed 25 April 2014.]
John L. O'Sullivan, the editor of the U.S. Magazine and Democratic Review, declares that the United States has a manifest destiny to occupy the North American continent. Manifest destiny became one of the most influential slogans in American history.