I always saw Tolwyn as manipulating the BW and Confed into an all out Civil War. Then while they are fighting each other, the BL would begin unleashing the bioweapons on both sides. They would decimate quite a bit of Confed and the BW's population. What would be left, Tolwyn hoped, would follow the leadership of the BL (lead by Tolwyn), which, of course, was not affected by the bioweapons.
And likely, most of the survivors would not know that Tolwyn was to blame, it would be spun to those people that it was the stupidity of Confed and the BW that both sides were responsible for the bioweapons. He was innocent, but had since the Kilrathi War been preparing a force (the BL) to help save humanity if another crisis arose. He never thought it would be becasue human fought human. With the Cats tied up with their own problems, he would hopefully have enough time enough to make humanity into a modern Sparta. He would then have access to all of the natural resources, but wouldn't have them drained away and wasted on the unfit.
[This message has been edited by Shane (edited August 17, 2000).]