Henry Demarest Lloyd edited several reformist publications before joining the Chicago Tribune in 1872 where his writings exposed the abuses of contemporary American society and proposed drastic reforms in business and government. His witty and controversial editorials contributed to the Tribune's reputation as a pioneer of liberal policies, and a leading anti-monopoly newspaper.

Lloyd's Papers, reproduced on microfilm, include his views on major topics such as tariff reform, monopolies, food legislation, conservation, immigration procedures and civil rights.