members of the community are gathered into one organized body. The centrifugal assails it, by dragging men (or groups) apart, so that the bonds of connexion are strained, and possibly at last loosened or broken. That no community can be exempt from the former force is obvious. But neither can any wholly escape the latter. For every community has been built out of smaller groups, and the members of such groups have seldom quite lost the attraction which each had to its own particular centre, such attraction being of course dissociative as regards the other groups and their members1. Moreover in no large community can there ever be a complete identity of views and wishes, of interests and feelings, between all the members. Many must have something to complain of, something which sets them against the rest and makes them desire to be, for some purposes, differently treated, or (in extreme cases) to be entirely separated. The existence of such a grievance constitutes a centre round which a group is formed, and this group is in so far an element of disjunction. Accordingly the history of every community and every constitution may be regarded as a struggle between the action of these two forces, that which draws together and that which pushes apart, that which unites and that which dissevers.

This subject, it may be thought, belongs either to History, in so far as history attempts to draw general conclusions from the facts she records, or to that branch of political science which may be called Poli

1 In the pages that follow the word Group is used to denote the section of persons within a larger community who may be held together by some tie, whether of interest or sentiment or race or local habitation, which makes them a sort of minor community inside the larger one.

tical Dynamics, and is one with which the constitutional lawyer is not directly concerned. The constitutional lawyer, however, must always, if he is to comprehend his subject and treat it fruitfully, be a historian as well as a lawyer. His legal institutions and formulae do not belong to a sphere of abstract theory but to a concrete world of fact. Their soundness is not merely a logical but also a practical soundness, that is to say, institutions and rules must represent and be suited to the particular phenomena they have to deal with in a particular country. It is through history that these phenomena are known. History explains how they have come to be what they are. History shows whether they are the result of tendencies still increasing or of tendencies already beginning to decline. History explains them by parallel phenomena in other times and places. Thus the lawyer who has to consider and advise on any constitutional problem, and still more the lawyer who has to contrive a constitutional scheme for grappling with a political difficulty, must study the matter as a historian, otherwise he will himself err and mislead those whom he advises. Great lawyers often have so erred, and with lamentable results. A lawyer who shall deal with a constitutional problem as he would deal with a technical point in the law of real property will be as much astray as an advocate who should prosecute or defend a political prisoner with a sole regard to the law of treason or sedition which he may find in his books, heedless of the temper and opinion of those from among whom the jury will be drawn.

An obvious illustration may be found in the fact that

when any particular community is studied from the constitutional point of view, and the inquiry is raised whether it ought to have a Flexible or a Rigid Constitution, the question of the comparative actual strength of these two forces becomes a vital one. Where the centripetal force is palpably the stronger, either sort of constitution will do to hold the community together: and the choice between the two sorts may be made on other grounds. But where the centrifugal force is potent, and especially where there are reasons to apprehend its further development, the establishment of a Rigid Constitution may become desirable, and yet may be a matter of much delicacy and difficulty. If the constitution be framed in the interests of a centralizing policy, there is a danger that it may assume and require for its maintenance a greater strength in the centripetal forces than really exists, and that for the want of such strength the constitution may be exposed to a strain it cannot resist. Amid the constant change of phenomena, a Rigid Constitution necessarily represents the past, not the present; and if the tendencies actually operative are towards the dissociation of the component groups of the community, a frame of government which fails to provide scope for these tendencies will soon become out of date and unfit for its work. Where, on the other hand, the existence of distinct groups, each desiring some control of its own affairs, is fully perceived and duly admitted as a factor in the condition of the community, and where it is desired to give legal recognition to the fact, and to protect the other local groups or sub-communities from being overridden by the largest among the groups, or by the

community as a whole, the creation of a Rigid Constition offers a valuable means of securing these objects. For such a constitution may be so drawn as to place the local groups under the protection of a fixed body of law, making their privileges an integral part of the frame of government, so that the whole Constitution must stand or fall with the maintenance of the rights enjoyed by the groups1. The familiar instance of such a form of Rigid Constitution is a Federal Constitution. It is specially adapted to the case of a country where the centrifugal forces are so strong that it is clear that the groups will not consent to be wholly merged and lost in one community, as under a Flexible Constitution might befall them, yet where they are sufficiently sensible of the advantages of combination to be willing to enter into a qualified and restricted union. And in these cases it has sometimes proved to be an efficient engine for further centralization. That is to say,

the best way of strengthening in the long run the centripetal tendencies has been to give so much recognition and play to the centrifugal as may disarm them, and may allow the causes which make for unity to operate quietly without exciting antagonism.

It appears accordingly that the historian who studies constitutions, and still more the draftsman who frames them, must have his eye constantly fixed on these two forces. They are the matter to which the legislator has to give form. They create the state of things which a Constitution has to deal with, so laying down principles and framing rules as on the one hand to

1 Subject of course to any provisions for amending the Constitution which may have been inserted. See Essay III, p. 207 sqq.

Their

recognize the forces, and on the other hand to provide safeguards against their too violent action. action will preserve or destroy the Constitution,—preserve it, if it has given them due recognition and scope, destroy it, if its provisions turn out to be opposed to the sweep of irresistible currents. The forces that move society are to the constructive jurist or legislator what the forces of nature are (in the famous Baconian phrase) to man. He is their servant and interpreter. They can be overcome only by obeying them. If he defies or misunderstands them, they overthrow his work. If he knows how to use them, they preserve it. But his difficulty is greater than that of the physicist, because these social forces are more complex than those of inanimate nature, and vary in their working from generation to generation.

II. TENDENCIES WHICH MAY OPERATE EITHER AS CENTRIPETAL OR AS CENTRIFUGAL FORCES.

Now let us see what are the chief among the tendencies which in political society are capable of playing the part either of centripetal or of centrifugal forces.

So far as individual men are concerned, all the tendencies that work on them may be said to be associative tendencies, that is to say, every thing tends to knit individual men together into a band or group, and to make them act together. The repulsion of man from man is so rare that we may ignore it. Even the keenest individualist desires to convert other men to his individualism, and forms a league for the purpose with others who are like-minded.