Early man rubbed two sticks together and created fire. We learn to cook our food, saving vital energy. As a result, our brains expand--making us the most intelligent species on the planet. Armed with fire, we experiment by heating minerals to make stronger tools allowing us to fight wars and build civilizations. But burning wood destroys our landscape, so Mankind exploits a new energy--oil.

Communication is the vital ingredient in the building of civilization. The ability to share complicated ideas allowed early man to hunt, farm and build communities. And the creation of things like a 22-letter alphabet and the printing press allow Mankind to further expand, leading to the proliferation of new ideas and revolution.