How was the inca empire successful in uniting the diverse people in the conquered areas? ?

The Inca people played very well tactically and through peaceful manner little by little were managing to unify the different people they have conquered and ruled over them. The Inca rulers were unifying the diverse people by making one language as official language of the Empire, making good infrastructure that was connecting all parts of the empire and thus allowed the people to integrate, they encouraged people to believe in their sun god Inti which made the empire religiously monogamous, and also the four regions of the empire had their own regional rulers, but all of them were under the command of one unifying Emperor which was also considered as deity.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

answer; i believe the correct answer is benjamin harrison;