Brother Against Brother

An abolitionist and all his family are murdered; a strange white learned child wanders around asking about his father Jacob, himself being Joseph hoping to get out ot Egypt after having quarrelled with Pothifar; a white baby is abandoned on the porch of the murdered abolitionist brother's
house.
The murdered abolitionist's brother, abolitionist himself, is the novel's
main character.
He has liberated all his slaves, who wouldn't think of leaving his plantations because he treats them so well.
The Civil War begins and separates the two abolitionist's sons, who go to fight on the opposing sides, the demented boy gets to live with the
abolitionist's family and recovers his wits thanks to the love and attention with which he is treated.
The war ends, the two brothers reconcile and the baby grows up and marries one of them.
A very bland, slow narrative centered on repeating the atrocious points of
view of the obtuse slavers and their reasons for keeping their slaves enslaved, alternating their discourses with those of the abolitionists.
Even understanding that the book was written in 1875 it seems very feeble
and simplistic.