James Weldon Johnson
A notable argument from a passage in James Weldon Johnson's book, The Autobiography of an Ex-Colored Man (1912):
[I]f the Negro is so distinctly inferior, it is a strange thing to me that it takes such tremendous effort on the part of the white man to make him realize it, and to keep him in the same place into which inferior men naturally fall. However, let us grant for sake of argument that the Negro is inferior in every respect to the white man; that fact only increases our moral responsibility in regard to our actions toward him. Inequalities of numbers, wealth and power, even of intelligence and morals, should make no difference in the essential rights of men.