abolitionism
Aには、
（アメリカ史）奴隷制度廃止論（南北戦争の原因の一つとなった）
との記述があるが、Ｇ・Ｗにはない。
American Heritageには、
The belief that slavary should be abolished. In the early nineteenth century, increasing numbers of people in the northern United States held that the nation's slaves should be freed immediately, without compensation to slave owners. John Brown, Frederick W. Douglass, William Lloyd Garrison, Sojourner Truth, and Harriet Tubman were well-known abolitionists.
Abolitionism in the United States was an important factor leading to the Civil War.
とある。