美國曆史學家詹姆斯·亞當斯斯在 1931 給美國夢下的定義-- Adams, James T. 1931: "that dream of a land in which life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement. … regardless of the fortuitous circumstances of birth or position," 美國國會圖書館 (Library of Congress), The American Dream -- What is the American Dream? (http://www.loc.gov/teachers/classroommaterials/lessons/american-dream/students/thedream.html )。