All the known elements in the periodic hart fall into two categories - paramagnetic or diamagnetic. With paramagnetic materials, the flux draws the materials into the areas of stronger flux. What we see on a daily basis is ferromagnetic interaction. Just because we don't see strong attractive forces with other materials doesn't mean that there is no effect. Diamagnetic materials, on the other hand, are materials that are driven into the weaker areas of magnetic flux.
Most materials possess paired electrons.
It is the action of spin of the unpaired electron that gives rise to the effect we call magnetism. It is simply the unpaired electron spin of the electron that gives rise to its magnetic moments and related field. Hydrogen, for example, in its para or other spin form, can either be paramagnetic or diamagnetic depending on the spin orientation. As previously mentioned the concept of electron spin is similar to our concept of spin in the everyday non-quantum world. In physics there is a fundamental law that states monentum cannot simply appear and disappear, since angular momentum is always conserved in any physical process.