The purpose of this monographic work is to analyse and convey a contemporary interpretation of the origin, foundation and realisation of the concept of the State developed by the idealist philosopher Hegel, in his famous philosophical system contained in Philosophy of Law - 1820/21. In order to do this, we will use Platonic and Aristotelian philosophy as a basis for the idea of the original state, as well as contractualist philosophy, based on these three contractual currents: liberal, absolutist and socialist, to support our contemporary reinterpretations of Hegel's concepts of the individual, the family, civil-bourgeois society, morality, ethics and the state.