ABSTRACT
One big difference between chimps and humans is our ability to use tools to shape the world in our favor. While it is true that chimps have used twigs to extract termites or rocks to break open nuts, they have done nothing like using fire for warmth, or cooking their food, or shaping selected rocks into cutting instruments. In this chapter, we will see how such actions helped us adapt to non-arboreal environments. Using these new tools also had the effect of changing us. We were becoming more human, and fire, cooking, and stone-cutting tools helped direct that evolutionary path.
