James Forten used his wealth and social standing to work for civil rights for African Americans in both the city and nationwide. Beginning in 1817, he opposed the colonization movements, particularly that of the American Colonization Society. He affirmed African Americans' claim to a stake in the United States of America. He persuaded William Lloyd Garrison to adopt an anti-colonization position and helped fund his newspaper "The Liberator" (1831–65), frequently publishing letters on public issues. He became vice-president of the biracial American Anti-Slavery Society, founded in 1833, and worked for national abolition of slavery. His large family was also devoted to these causes, and two daughters married the Purvis brothers, who used their wealth as leaders for abolition.