A temporary continuation of national control in the southern States would also have a most beneficial effect as regards the immigration of northern people and Europeans into that country; and such immigration would, in its turn, contribute much to the solution of the labor problem. Nothing is more desirable for the south than the importation of new men and new ideas. One of the greatest drawbacks under which the southern people are laboring is, that for fifty years they have been in no sympathetic communion with the progressive ideas of the times. While professing to be in favor of free trade, they adopted and enforced a system of prohibition, as far as those ideas were concerned, which was in conflict with their cherished institution of slavery; and, as almost all the progressive ideas of our days were in conflict with slavery, the prohibition was sweeping. It had one peculiar effect, which we also notice with some Asiatic nations which follow a similar course. The southern people honestly maintained and believed, not only that as a people they were highly civilized, but that their civilization was the highest that could be attained, and ought to serve as a model to other nations the world over. The more enlightened individuals among them felt sometimes a vague impression of the barrenness of their mental life, and the barbarous peculiarities of their social organization; but very few ever dared to investigate and to expose the true cause of these evils. Thus the people were so wrapt up in self-admiration as to be inaccessible to the voice even of the best-intentioned criticism. Hence the delusion they indulged in as to the absolute superiority of their race--a delusion which, in spite of the severe test it has lately undergone, is not yet given up; and will, as every traveller in the south can testify from experience, sometimes express itself in singular manifestations. This spirit, which for so long a time has kept the southern people back while the world besides was moving, is even at this moment still standing as a serious obstacle in the way of progress. Nothing can, therefore, be more desirable than that the contact between the southern people and the outside world should be as strong and intimate as possible; and in no better way can this end be subserved than by immigration in mass. Of the economical benefits which such immigration would confer upon the owners of the soil it is hardly necessary to speak.