In the twenty years before Einstein died, he almost never accepted invitations to speak at universities. In 1946 he broke his self-imposed rule to give an address and accept an honorary degree from a small, traditionally black university: Lincoln University in Pennsylvania.
At Lincoln University he declared: “The separation of the races is not a disease of colored people, but a disease of white people. I do not intend to be quiet about it.”
Down Below, Albert Einstein teaches a Physics Class to young black men (1946)