This boils down to what magnetism is. My favorite explanation is the Kaluza-Klein hypothesis that explains magnetism as an emergent effect of space geometry. If

This boils down to what magnetism is. My favorite explanation is the Kaluza-Klein hypothesis that explains magnetism as an emergent effect of space geometry. If this explanation is accepted, we still need to answer what causes things to move forward and "execute" these maxwell/KK equations. And that's a great mystery.