Central first? Why? I think because math (mere science, mere laws, the simple code) then math unto death (bad science in North America, the Galaxy is not alive because of bad math), then math unto life in South America. That's probably what's happening. Uh, more info in replies above. This was predicted a very long time ago, I'm pretty sure. Around ice age? 10 thousand years ago. Killing me over would be quite a temper tantrum.