It would be necessary to take one by one the laws and institutions of each people to show to what extent they are the expression of the needs of each race and are incapable, for that reason, of being violently transformed. It is possible, for, instance, to indulge in philosophical dissertations on the advantages and disadvantages of centralisation; but when we see a people composed of very different races devote a thousand years of efforts to attaining to this centralisation; when we observe that a great revolution, having for object the destruction of all the institutions of the past, has been forced to respect this centralisation, and has even strengthened it; under these circumstances we should admit that it is the outcome of imperious needs, that it is a condition of the existence of the nation in question, and we should pity the poor mental range of politicians who talk of destroying it. Could they by chance succeed in this attempt, their success would at once be the signal for a frightful civil war,[10] which, moreover, would immediately bring back a new system of centralisation much more oppressive than the old. [10] If a comparison be made between the profound religious and political dissensions which separate the various parties in France, and are more especially the result of social questions, and the separatist tendencies which were manifested at the time of the Revolution, and began to again display themselves towards the close of the Franco-German war, it will be seen that the different races represented in France are still far from being completely blended. The vigorous centralisation of the Revolution and the creation of artificial departments destined to bring about the fusion of the ancient provinces was certainly its most useful work. Were it possible to bring about the decentralisation which is to-day preoccupying minds lacking in foresight, the achievement would promptly have for consequence the most sanguinary disorders. To overlook this fact is to leave out of account the entire history of France.