To answer this question, I truly believe that first we must first discuss as well as understand the text. Hariari entertains two revolution as examples to display evolution. In my humble opinion, these examples illustrate Hariari’s study. The first revolution–being the cognitive revolution–displays the development and progression of humankind. This revolution is somewhat deceiving, the cognitive revolution was not simply a revolution of cognition but rather a growth towards fields of logic as well as developing social constructs. In accordance with the text, Harari uses the example of homo sapiens discovering fire. This exemplifies that humans developed in a cognitive manner; however, in a nontraditional way according to modern standards. During this revolution, there was not learning in a traditional sense but rather processing information in a logic based system that allowed for an easier understanding. Often times this information was shared through stories, art and visual illustrations. The next revolution discussed in the text was the agricultural revolution. I believe that this revolution was vital to the existence of humankind. Without the realization that animals can be used to harvest from instead of just killed for their products is revolutionary. The effects of maintaining livestock to expand economically allowed for growth on an exponential level.
Homo sapiens developed through the ability to communicate, I would argue alongside Harari and say that this ability is what separates humankind from other species. As a species the ability to communicate on both small and larger scales allowed for collaboration and growth. Collaboration is a key component to the growth of humankind this collaboration allowed for humans to develop a social society that has continued to grow off of itself for millions of years. In this process humankind has risen above all other species and in turn became the most dominant species.