Who is Xolelwa Azania (Paul Redeker) from World War Z and what is their importance?

Xolelwa Azania (Paul Redeker) is the man who invented the Redeker Plan. He is one of the most loved men in the world, since his plan for war possibly saved the human race.... and one of the most hated, since his plan also called for the death of several million people. He is described by some as dispassionate, evil, racist, and inhumane, while others see him as an invaluable source of intellect.