QQC: Numbers Reading

Question: How did someone make up numbers, name each one, and how did the concept of numbers spread so much? Also what makes humans be able to count that animals don't have?

Quote: The trick they used was very simple: as warriors left to go to battle, they each put a rock in the pile. When they got home again, they each removed one. The number of rocks left equaled the number of men lost.

Comment: I was reading the picture diagram about the Zuni pronunciation of numbers and I thought the actual definition of the things they said (the finger that divides equally) was a clever thing to do. It makes me wonder how they even thought about counting things and dividing things like that.