Bill, do you belive wars require abstract thinking? Chimpanzees can go to war that can last for several years: https://en.wikipedia.org/wiki/Gombe_Chimpanzee_War
Humans are not the only animals that are capable of assessing an another tribe in terms of size, resources and potential threat, and then making an educated decision if to go to war or not. It is a mix of emotions and rational thinking. Humans and other animals understand the feelings of other animals. Dogs even understand human emotions.
It doesn't require a brain to learn, remember, or solve puzzles, as even slime mould is capable of that: https://www.youtube.com/watch?v=2UxGrde1NDA
The decisions of a slime mould are the result of remembering and then making decisions based on new information and mixing them with the memories.
Humans are not the only animals that are capable of assessing an another tribe in terms of size, resources and potential threat, and then making an educated decision if to go to war or not. It is a mix of emotions and rational thinking. Humans and other animals understand the feelings of other animals. Dogs even understand human emotions.
It doesn't require a brain to learn, remember, or solve puzzles, as even slime mould is capable of that: https://www.youtube.com/watch?v=2UxGrde1NDA
The decisions of a slime mould are the result of remembering and then making decisions based on new information and mixing them with the memories.
Generational hormone theory: https://jannemiettinen.fi/FourthTurning/