The constitution of the family and its relation with the State are, as it were, the chief centre round which all fresh researches must revolve, and these form the subject of this short and summary essay. As a preliminary step towards the solution of the problem, an accurate investigation is required of the various forms that the family assumed under the various systems of law which succeeded one another in Italy, in order to ascertain how it was that from the combination of those various forms, another and widely different one should have resulted. The first question therefore that presents itself has reference to the condition of the Roman law and the Roman family at the time of the barbarian invasion. As regards the Italian communes, it is only natural that the Roman jurisprudence should strike the deepest and strongest root in their social system, and that the history of our laws should originally find in it their first beginning. Here, however, we are forced to enter on a digression which, although seemingly apart from the point, will presently help us to a clearer understanding of the new society in course of development. With regard to this digression it should also be said that so much learning and research have been directed to the study of Roman law, that we are able to arrive at certain trustworthy conclusions which, by affording evidence of the close connection between the Roman family, and the political society derived from it, will show us what path to take in pursuit of the same connection in the history of Italy. II.