What is the Cognitive Revolution and how did it give rise to human language and symbolic thinking? What distinguishes human language and our ability to think symbolically from other animals and their ability to communicate with sounds?

In Sapiens, the author argues that at the center of human relationships and human community is language and the ideas that it allows us to communicate. Language and ideas are part of the realm of human culture made possible by what is called the “Cognitive Revolution.”

What is the Cognitive Revolution and how did it give rise to human language and symbolic thinking?
What distinguishes human language and our ability to think symbolically from other animals and their ability to communicate with sounds?
What are the two central functions of language as described by the author of Sapiens?
Explain how each of these two functions help to create two different types of human communities. Explain the two different types of communities they are able to create.
Lastly, what does the author mean by “An Imagined Order” and how does this concept relate to the functions of language? Provide an example from the text to illustrate what an imagined order is. Explain this example including why it is an example of an Imagined Order.