Human evolution refers to the process of random mutation and natural selection that—over millions of years—led to the emergence of modern humans: Homo sapiens. Bipedalism and encephalization provided early hominids the capabilities to use tools, which likely led to better nutrition through hunting, which increased brain size further, improving tools and hence nutrition even more. This cycle is responsible for massively increasing our cognitive resources and allowing for important future developments like the control of fire. The story of human evolution has been one of cognitive capacity; the second major increase was so significant that it is called the Cognitive Revolution. While we are not sure of its trigger—it's one of the key mysteries of our evolution—the subsequent creation of language was a fundamental shift in the fate of our species. For the first time, we were able to communicate abstract ideas and form societies and cultures around those shared beliefs. No longer were we limited to small bands of 150 (Dunbar's number on the upper limit of one-to-one social relationships); instead, our newly created common myths let complete strangers cooperate to form agricultural empires, develop mass religion, build cities and monuments, and create the legal and economic systems that run our world today. Buddhism, capitalism, Porsche, Australia, and more are all examples of shared myths. And so are Avenues Online and The Network.