When you look at the hydrogen atom with its one proton and one electron, which one appears to be the “brain”?
In the hydrogen atom, though the positive and negative charges are balanced, the electron is out of balance. Electrons want to be paired and it is alone. Therefore when it has an opportunity, it will bond with another electron, usually another valence electron of another atom, not necessarily a hydrogen atom. So the electron solves the problem in the hydrogen atom—it sees the imbalance and takes actions to solve it. And it does so from the peripheral location. One part of the atom, the proton, is fine with the static nature—the other, the electron, is not.
The human brain or any other brain is a problem-solving mechanism. It tries to figure out how to deal with the interaction between itself, its organism, and the environment. You will note that the human brain is on the periphery of the human body also, just as the electron is on the periphery of the atom.
Extending the argument further, human society and civilization require a problem-solving “brain” also. And again, this brain is found on the periphery. It is the group that I named the IMPACTS. Society has to pull in these IMPACTS brains if it is to function satisfactorily.
It is no accident of course that our brain is an electro-chemical entity. That is what we would expect since the electron in the hydrogen atom was the early problem-solver in the universe.