Here in this alternative world is the Collective Unconscious or God. Charles' plan is to remake the world so that individuals no longer exist. We are all just facets of the collective unconscious anyway.
Marianne, C.C., and V.V. were his allies in achieving this.
They justify abandoning their own children by looking forward to a reunification in the collective unconscious? Unacceptable.
Lelouch uses his geass on God itself. Not as a command, but simply a request.
The thought elevator collapses, and Charles disintegrates.