Russell was very lukewarm (and by todays standards racist) in converting black & coloured people...
1898 "God .. evidently has been a respecter of races, and has specially blessed and favored certain branches of the Aryan race in Europe and America.. the white race has been more abundantly blessed with the light of the Gospel than others .. the elect Church will probably be composed chiefly of the highly favored white race.." {EVOL 30-1}
1900 "There are probably as many as a hundred colored brethren on the Watch Tower lists, some of them very clear in the truth, and very earnest in its service, financially and other-wise .. [but they are not allowed to participate in the "pioneer work" as] although we have received letters from several of these, who had intended engaging in the volunteer work, expressing surprise that in the call for volunteers in the March 1, 1900 issue we restricted the inquiry to white Protestant churches. .. The reason is that so far as we are able to judge, colored people have less education than whites - many of them quite insufficient to permit them to profit by such reading as we have to give forth. Our conclusion therefore is based upon the supposition that reading matter distributed to a colored congregation would more than half of it be utterly wasted, and a very small percentage indeed likely to yield good results. We advise, therefore, that where the Watch Tower literature is introduced to colored people it be not by promiscuous circulation, but only to those who give evidence of some ear for the truth. We avoid, so far as possible, putting the pearls of present truth into the hands of the vicious and depraved .." {ZWT Apr 15 1900 122}