In this study, the author presents, from the point of view of the constitutional law, the complex process of re-emergence of the state formations after the break-up of the Roman imperial administration at the end of the 5th century. The collapse of the boundaries of the West Roman Empire and the penetration of the conquering migratory populations to its centre have generated not only the destruction of the military capacity of the empire and its army, but also of the political institutions and of the entire Roman administration. Practically, the Roman state has entered an advanced dissolution process that has led also to the replacement of the old production relations with new relations. Instead of the Roman administration, rudimentarily organized patriarchal formations which responded to the new military conditions imposed on the indigenous population by the conquering populations appeared. At the same time with these, in the former Roman provinces, the Christian churches continued to carry on a social organization activity. Practically, the Christian Church took over some social organization and management functions, specific in the past to the Roman administration.
The gradual conversion of the conquering populations to Christianity has stimulated the process of restating and the emergence of the first barbarian kingdoms. The Church had thus an overwhelming role and hastened the re-emergence of the statehood on the former territories of the vast Roman Empire. Finally, new states have emerged on the European continent, with well defined ethnic physiognomies and endowed with a political administration based on constitutional principles that have proven their validity in the subsequent centuries.
At the same time with the formation of the new states, a new theory of the political institutions has been forged and gradually developed, in which, along with the elements of laic thinking, many precepts of Christian religion can be emphasized.
