The truly unique trait of 'Sapiens' is our ability to create and believe fiction. All other animals use their communication system to describe reality. We use our communication system to create new realities. Of course, not all fictions are shared by all humans, but at least one has become universal in our world, and this is money.

Humans have an amazing capacity to believe in contradictory things. For example, to believe in an omnipotent and benevolent God but somehow excuse Him from all the suffering in the world. Or our ability to believe from the standpoint of law that humans are equal and have free will and from biology that humans are just organic machines.

Dollar bills have absolutely no value except in our collective imagination, but everybody believes in the dollar bill.

Yuval Noah Harari Quotes