Sumerians would be the answer
Just because slavery ended did not mean segregation, prejudice, and hate did. Many people did not like that they were granted these rights and segregated them, based on the "separate but equal" principle. The South is famous for its Jim Crow laws that segregated black Americans, but segregation existed everywhere. Groups such as the kkk formed, etc.
Answer:
6000 years ago
We believe Sumerian civilization first took form in southern Mesopotamia around 4000 BCE—or 6000 years ago—which would make it the first urban civilization in the region. Mesopotamians are noted for developing one of the first written scripts around 3000 BCE: wedge-shaped marks pressed into clay tablets.
1. The king of Britain created unreasonable taxes
2. The colonist had to basically do whatever the king asked them to.. so they wanted to create their own government