>There was a localized weakening of the geomagnetic field > geological proof

This is an interesting theory. My question is: What methods are you using to test the change in magnetic fields? Put another way, what is your middle range theory from an archaeological perspective? How are you dating your samples? etc.

Mhmm. Take your meds.

Robert J. Sawyer wrote a series of sf books called The Neanderthal Parallax which proposes that human sentience (and Neanderthal sentience) originated, and ended, with changes in the Earth's magnetic field. It explored some very interesting social and anthropological ideas.

https://en.wikipedia.org/wiki/The_Neanderthal_Parallax