We are introduced to the magnetic field as a way to keep track of the force that arises from lenght contraction in special relativity. a moving distribution of charge becomes more dense in the right frame. so in a way, the magnetic field is just the e-field. however, when i glance over the physics of permanent magnets, it is said that their magnetic field arises from the integral sum of their electrons with aligned spin(which generates a magnetic moment).spin is quantized fundamental property of elementary particles, analoguous(but not the same as) angular momentum of rotation.(point like particles don't rotate).so what is the magnetic field? how do these two views are reconciled?