derived from one or the other the prevailing type would be different. And therefore the mixture of persons of different race in the same commonwealth, unless one race had a complete ascendancy, tended to confuse all the relations of human life, and all men's notions of right and wrong; or by compelling men to tolerate in so near a relation as that of fellow-citizens differences upon the main points of human life, led to a general carelessness and scepticism, and encouraged the notion that right and wrong had no real existence, but were mere creatures of human opinion.' But if this be so, the oligarchies were right. Commerce brings this mingling of ideas, this breaking down of old creeds, and brings it inevitably. It is now-a-days its greatest good that it does so; the change is what we call 'enlargement of mind'. But in early times Providence 'set apart the nations;' and it is not till the frame of their morals is set by long ages of transmitted discipline, that such enlargement can be borne. The ages of isolation had their use, for they trained men for ages when they were not to be isolated. NO. II THE USE OF CONFLICT. 'The difference between progression and stationary inaction,' says one of our greatest living writers, 'is one of the great secrets which science has yet to penetrate.' I am sure I do not pretend that I can completely penetrate it; but it undoubtedly seems to me that the problem is on the verge of solution, and that scientific successes in kindred fields by analogy suggest some principles--which wholly remove many of its difficulties, and indicate the sort of way in which those which remain may hereafter be removed too.