"1838" . . . . . . . . . . . . "Controversial literature"@en . . . "Controversial literature" . . . . . "Views on slavery, in its effects on the wealth, population, and character of nations"@en . "Views of slavery, in its effects on the wealth, population, and character of nations"@en . "Views of slavery, in its effects on the wealth, population, and character of nations" . . . . . . . .