I dont need to say a word:
...the curse which Noah pronounced upon Canaan was the origin of the black race. Certain it is that when Noah said, "Cursed be Canaan, a servant of servants shall he be unto his brethren," he pictured the future of the Colored race. They have been and are a race of servants, but now in the dawn of the twentieth century, we are all coming to see this matter of service in its true light and to find that the only real joy in life is in serving others; not bossing them. There is no servant in the world as good as a good Colored servant, and the joy that he gets from rendering faithful service is one of the purest joys there is in the world (The Golden Age, July 24, 1929: 702).
...our colored brothers have a great cause for rejoicing. Their race is meek and teachable, and from it comes a high percentage of the theocratic increase (The Watchtower, Feb. 1, 1952: 95).
By the way, by 1929, the FDS was already stablished and publishing the will of God, according to the latest new light.