The conspirators, staunch environmentalists, believe that the great proliferation of humanity is destroying the
biosphere and that the optimum number of humans in the world should not exceed half a million. Therefore, the "excess" billions must be killed off. The plan is to use the Olympics where people from virtually every country in the world are gathered, and infect athletes and spectators with a mutated form of
Ebola which they would carry back to their countries. When the disease starts breaking out in various countries, the Horizon Corporation would announce that it had fortunately developed a vaccine and is set to produce it on a large scale, and be hailed as a savior. The world's governments would hurriedly organize giving the supposed vaccine to their entire populations. By the time it is realized that in fact it was the disease itself, it would be too late - the whole of humanity would be dead or dying, except for the "chosen few" who would get the real vaccine and who would inherit the emptied world. The fanatic conspirators, bearing no personal animosity to the billions they plan to kill, are utterly convinced of the justness of their act and think of it as "saving the world" - i.e., saving the environment and the biosphere from the encroachment of destructive humanity.