The Heritage Foundation. “How Strong is the United States Military?” Heritage, 2019. https://www.heritage.org/defense/heritage-explains/how-strong-the-united-states-military
Hoover, Herbert. The Future Of American Individualism. Hoover Institution, 2011. https://www.hoover.org/research/future-american-individualism
Johnson, Paul. A History of the American People. HarperCollins, 1997.
Keuilian, Bedros. “Why America Is Still the Land of Opportunity.” Entrepreneur, March 14, 2018. https://www.entrepreneur.com/article/310208
Sherman, Andy. “Long Live American Ingenuity.” The Hill, October 19, 2018. https://thehill.com/opinion/finance/412211-long-live-american-ingenui