And civil rights leader Kenneth Clark has died at the age of 90. In 1950 the psychologist published an influential report detailing the destructive effect of school segregation. The paper would go on to influence the Supreme Court in its landmark decision in Brown v. the Board of Education that ruled school segregation was unconstitutional. Dr. Clark was the first African-American to earn a doctorate in psychology from Columbia University. He was also the first African-American to receive tenure in the City College system of New York. He once wrote “a racist system inevitably destroys and damages human beings; it brutalizes and dehumanizes them, black and white alike.”