Although over-centralisation is to be avoided, a certain amount of control from a central authority is not only unavoidable; if properly exercised, it is most beneficial. One danger to which the local agent is exposed is that, being ill-informed of circumstances lying outside his range of political vision, he may lose sight of the general principles which guide the policy of the Empire; he may treat subjects of local interest in a manner calculated to damage, or even to jeopardise, Imperial interests. The central authority is in a position to obviate any danger arising from this cause. To ensure the harmonious working of the different parts of the machine, the central authority should endeavour, so far as is possible, to realise the circumstances attendant on the government of the dependency; whilst the local agent should be constantly on the watch lest he should overrate the importance of some local issue, or fail to appreciate fully the difficulties which beset the action of the central authority. To sum up all that there is to be said on this branch of the subject, it may be hoped that the fate which befell Rome, in so far as it was due to the special causes of decay now under consideration, may be averted by close adherence to two important principles. The first of these principles is that local revenues should be expended locally. The second is that over-centralisation should above all things be avoided. This may be done either by the creation of self-governing institutions in those dependencies whose civilisation is sufficiently advanced to justify the adoption of this course; or by decentralising the executive Government in cases where self-government, in the ordinary acceptation of the term, is impossible or undesirable. 6. _Barbarous Finance._--Mr. Hodgkin says that the system of Imperial taxation under the Roman Empire was "wasteful, oppressive, and in a word, barbarous." He gives, as an instance in point, the Roman Indiction. This was the name given to the system under which the taxable value of the land throughout the Empire was reassessed every fifteen years. At each reassessment, Mr. Hodgkin says, "the few who had prospered found themselves assessed on the higher value which their lands had acquired, while the many who were sinking down into poverty obtained, it is to be feared, but little relief from taxation on account of the higher rate which was charged to all."