How did slavery divide America racially?

As early as the debates over the Declaration of Independence, slavery had divided Americans. But not until the 1830s did a mass movement, inspired by religious revivals that swept much of the North, emerge favoring the abolition of slavery. Unlike previous opponents of slavery, abolitionists demanded immediate rather than gradual emancipation.

Explanation:

general allotment act (dawes act) february 8, 1887

amendment to the dawes act, february 28, 1891

commission to the five civilized tribes (dawes commission), march 3, 1893