Kenneth Bancroft Clark was born in July,24,1914, Panama Canal zone. He play an important role in civil right movement. When they were trying to end segregation in school. He did the doll test on more than 200 children from age 3-7. And the result was that children as early as 3 years old wanted the white doll over the other ones. His study prove that segregation did have a psychological impact on children. That study play apart in the decision to end segregation. And he was the black president of the American psychological association.