The same applies to Rome, concerning which Mommsen, a cautious author, states: “Rome owes its importance, if not its origin, to these commercial and strategic relations. Evidence of this is found in many traces of far greater value than the tales of historical novels pretending to be authentic. Take an instance of the primæval relations existing between Rome and Cære, which was for Etruria what Rome was for Latium, and thereafter was its nearest neighbor and commercial friend; or the uncommon importance attributed to the bridge over Tiber and the bridge building (Pontifex Maximus) in every part of the Roman State; or the galley in the municipal coat of arms. To this source may be traced the primitive Roman harbor dues to which, from early times, only those goods were subject which were intended for sale (_promercale_) and not what entered the harbor of Ostia, for the proper use of the charterer (_usuarium_), and which constituted therefore an impost on trade. For that reason we find the comparatively early use of minted money, and the commercial treaties of states oversea with Rome. In this sense, then, Rome may, as the story of its origin states, have been rather a created than a developed city, and among the Latin cities rather the youngest than the eldest.”[89]
It would require the work of a lifetime of historical research to investigate these possibilities, or rather these probabilities; and then to write the constitutional history of these preëminently important city states, and to draw thence the very necessary conclusions. It seems to me that along this path there would be found much information on many an obscure question, such as the Etruscan dominion in Rome, or the origin of the rich families of Plebeians, or concerning the Athenian _metoikoi_, and many other problems.
Here we can only follow the thread which holds out the hope of leading us through the labyrinth of historical tradition to the issue.
(d) ESSENCE AND ISSUE OF THE MARITIME STATES
All these are true “States” in the sociologic sense, whether they arose from the fortresses of sea-robbers, or from harbors of original land nomads as merchant colonies which obtained dominion or which amalgamated with the dominating group of the host people. For they are nothing but the organization of the political means, their form is domination, their content the economic exploitation of the subject by the master group.