On the Distinct Likelihood that if the Savage Drought that Took Place In Africa 5 to 6 Million Years Ago Didn't Happen, Those Chimp-Like Beasts that Eventually Became Our Ancestors (the Homo Ergasters) Would Have Never Left the Forested Areas In an Effort to Look for Food on the Ground and Never Evolved to the Point of Walking Upright, Using One's Hands, Forming Stable Mating Patterns, etc..

So Al Gore's dream scenario, in other words. Interesting.