The common sense of mankind, in all ages of the world, has uniformly attributed the downfall of nations, states, and empires, to moral causes, not to physiological laws, climatic influences, or geographical position. The wicked shall be turned into hell, and all the nations that forget God. Righteousness exalteth a nation, and sin is a reproach to any people. This is alike the voice of inspiration and of universal experience. The traveller who visits the sites of nations renowned in story, now buried in ruins, of cities once thronged with a teeming population, the marts of the world, in which were heard, from morning till night--till far into night--the din of industry, and marks the solitude that now reigns there; the barren waste that has succeeded to once fruitful fields and vineyards, and observes the poor shepherd that feeds a petty flock on the scanty pasturage, or the armed robber that watches for a victim to plunder, receives a far less vivid impression of the dependence of nations on physical causes and conditions, than of the influence of the moral world on the natural, and reads in legible characters the meaning of that fearful penalty which God pronounced, when he said to the man: "And the earth for thy sake shall be cursed." The physical changes that have come over Assyria, Syria, Lybia, Egypt, and Palestine, are the effects of the moral deterioration of man, not the cause of that deterioration. The professor, after dilating almost eloquently, and as a sage, on the changeability, the transitoriness, the evanescent nature of all the visible forms of things, says: "If from visible forms we turn to directing law, how vast the difference! We pass from the finite, the momentary, the incidental, the conditional, to the illimitable, the eternal, the necessary, the unshackled. It is of law I am to speak in this book. In a world composed of vanishing forms, I am to vindicate the imperishability, the majesty of law, and to show how man proceeds in his social march in obedience to it," (_Ibid_. p, 16.) This sounds well; but, unhappily, he has told us that communities and nations, like individuals, are under the control of physical conditions, and _therefore_ of law. If _therefore_ of law, then under the law of physical conditions, and consequently of a physical or physiological law. He dwells on the grandeur of this conception, and challenges for it our deepest admiration. But we see not much to admire in a purely physical law manifesting itself in ceaseless instability, metamorphosis, and death. Will the author forgive us, if we hint that he possibly does not very well understand himself, or know precisely what it is that he says? Hear him. "I am to lead my reader, perhaps in a reluctant path, from the outward phantasmagorial illusions which surround us and so ostentatiously obtrude themselves on our attention, to something that lies in silence and strength behind. {172} I am to draw his thoughts from the tangible to the invisible,