After the initial Club of Rome meeting in the 1970's it was concluded that there were too many people and Aids appeared on the scene. Before that Bertrand Russel one of the most admired philosophers in the Anglo Saxon sphere had said, in his book Marriage and Morals that "In extreme cases there can be little doubt of the superiority of one race to another…. There is no sound reason to regard negroes as on the average inferior to white men, although for work in the tropics they are indispensable, so that their extermination (apart from questions of humanity) would be highly undesirable." so there was an intellectual debate wether to kill off all blacks, to exterminate.
http://en.wikipedia.org/wiki/Bertrand_Russell
Then people wonder why blacks are suspicious,