There was already much opposition to the war effort.
The pamphlet and variations on it were reprinted widely in both the north and south by Democrats and Confederates.
The pamphlet was entitled Miscegenation: The Theory of the Blending of the Races, Applied to the American White Man and Negro.
Thus the Comte de Montlosier, in exile during the French Revolution, equated class difference in 18th-century France with racial difference. in 1863, and the etymology of the word is tied up with political conflicts during the American Civil War over the abolition of slavery and over the racial segregation of African-Americans.
Borrowing Boulainvilliers' discourse on the "Nordic race" as being the French aristocracy that invaded the plebeian "Gauls", he showed his contempt for the lowest social class, the Third Estate, calling it "this new people born of slaves ... Miscegenation comes from the Latin miscere, "to mix" and genus, "kind". The reference to genus was made to emphasize the supposedly distinct biological differences between whites and non-whites, though all humans belong to the same genus, Homo, and the same species, Homo sapiens.
Conversely, people classified in censuses as black, brown ("pardo") or indigenous have disadvantaged social indicators in comparison to the white population.
The concept of miscegenation is tied to concepts of racial difference.