In 1930, Rugg and his associates published "History of American Civilization: Economic and Social" followed in 1931 by "A History of American Government and Culture." By examining the preface of these two works, one is able to gain insight into the philosophic basis of the textbook series. These two volumes represented a complete and unified history of the United States. The former was a cultural and geographic survey of American history, while the latter was a cultural and governmental history of the nation. The rationale for the texts was to help the students comprehend the major modes of living in their country. Rugg envisioned that his curriculum would allow young Americans to focus on the "American Problem." Rugg identified the American Problem as follows: How could the United States develop a society of abundance, adhere to democratic principles, appreciate the integrity of expression, and develop the potential available for tomorrow? Students would investigate the American Problem by examining the difficulties confronted in the various modes of living presented in their historical perspective. Rugg included activities in a pupil's workbook to stimulate thought on the American Problem. Students used the reading books and workbooks together to facilitate thought provoking activities. Rugg stated that his whole program introduced the students to the historical development of world civilization. His curriculum is outlined in this article. (Contains 28 endnotes.)