Harari begins with an explanation of Homo Sapiens and the sharing genus with neanderthalensis and erectus. However, all other homo species disappeared leaving just the Sapiens. Harari continues to discuss talks about two different revolution in the beginning of his book: Cognitive revolution and agriculture revolution.
Cognitive revolution is explained as cognitive demands that led to socialization of groups. These groups then led to brain growth and eventually leading to other human advancements such as language and even storytelling. Storytelling is when the Sapiens were able to create their own types of realities and this allowed further organizational and social growth.
Imagined order is an inter-subjective order that is shared amongst groups of people. For example, like the US dollar or the constitution itself. Imagined orders stays in place because of the repetition of them being told. I don’t enjoy the question, how do they further human cooperation because I also think this leads to controversy. Imagined orders create a sense of morality and beliefs and everything but isn’t that the issue too with humans? Not everyone agrees with these imagined orders but as Harari asked, “How do you cause people to believe in an imagined order such as Christianity, democracy or capitalism? First, you never admit that the order is imagined.”