Because all electrons, nucleons, and other particles or quanta (because quantum mechanics is applied to all particles, these should be known as quanta) undergo a persistent spin motion without having any source of infinite energy, they should have a unique structure that provides their persistent spinning, as well as their other properties that they display. In addition, there should be some reason or purpose why they show a persistent spin motion, because, in nature, nothing occurs without a reason or purpose. At present, research on this topic attempts to determine how electrons, nucleons, and other particles possess the property of persistent spin motion and other properties through their unique structures as well as the purpose why they have such persistent spin motion. The results of these determinations provide the knowledge of a new force possessing the characteristics of nuclear force and both attractive and repulsive components, and provide very clear and complete explanations of:1) all the phenomena; 2) all the properties and effects of their systems; and 3) structures of their systems, e.g., deuterons, alpha particles, and nuclei; those are generated due to these particles.