The modern State is the distinctive product of a unique civilization. But it is a product which is still in the making, and a part of the process is a struggle between new and old principles of social order. To understand the new, which is our main purpose, we must first cast a glance at the old. We must understand what the social structure was, which-mainly, as I shall show, under the inspiration of Liberal ideas-is slowly but surely giving place to the new fabric of the civic State.