White people in the South may never fully know the extent to which Negroes defended themselves and protected their jobs—and, in many cases, their lives—by perfecting an air of ignorance and agreement. In days gone by, no cook would have dared to tell her employer what he ought to know. She had to tell him what he wanted to hear. She knew that the penalty for speaking the truth could be loss of her job.
Martin Luther King Jr., Why We Can’t Wait, published 1964.