Good post,

OK....
I have a Theory about the last theory..

Like a top spinning (the earth) the wobble gets larger and larger.

Thus making the magnetic north move..
Maybe the ancients knew this and built pyramids all over the world to "balance" the earth and stop the wobble..

Like a figure skater that pulls her arms in closer, she spins faster..

We have been mining and drilling for oil bringing these natural resources further away...

slowing down the spin of the earth causing the "wobble"

just my thoughts..enjoy