Foundations covers everything from the Big Bang up until roughly 600 BCE. Sounds like a lot, right? It is. Like 13.8 billion years. Such a long time, one might think that this historical era will be the most difficult. This era sets the stage for humanity as we know it. The main ideas are that humans evolved, left Africa, started farming, religion, invention, and social hierarchy. The neolithic revolution marked the beginning of this era, where humans first domesticated agriculture and diversified farming which led to complex civilizations.