Now the great bond of union, agreed upon in the general government, was "the rights of man"—expressed in the national constitution by the terms "liberty and justice." What other bond could have been agreed upon? On what other principle of government could they all have united? Could they have united to sustain the divine right of kings? The feudal privileges of nobles? Or the supremacy of the Christian, Mahometan, or any other church? No. They all denied the divine right of kings, and the feudal rights of nobles; and they were of all creeds in religion. But they were agreed that all men had certain natural, inherent, essential and inalienable rights, among which were life, liberty and the pursuit of happiness; and that the preservation of these rights was the legitimate purpose of governments among men. They had avowed this principle before the world, had fought for it, and successfully defended it, against the mightiest power in the world. They had filled the world with its glory; and it, in turn, had filled the world with theirs. It had also gathered, and was then gathering, choice spirits, and large numbers of the oppressed from other nations unto them. And this principle—in which were involved the safety, interests and rights of each and every one of "the people," who were to unite for the formation of the government—now furnished a bond of union, that was at once sufficient, legitimate, consistent, honorable, of universal application, and having more general power over the hearts and heads of all of them, than any other that could be found to hold them together. It comported with their theory of the true objects of government. This principle, therefore, they adopted as the corner-stone of their national government; and, as a matter of necessity, all other things, on which this new government was in any degree to depend, or which was to depend in any degree upon this government, were then made to conform to this principle. Hence the propriety of the power given to the general government, of "guaranteeing to every state in the Union a republican form of government." Had not this power been given to the general government, the majorities in each state might have converted the state governments into oligarchies, aristocracies, monarchies or despotisms, that should not only have trampled upon the minorities, and defeated their enjoyment of the national constitution, but also introduced such factions and feuds into the national governments, as would have distracted its councils, and prostrated its power.

But there were also motives of a pecuniary and social, as well as political nature, that made it proper that the nation should guarantee to the states a republican form of government.

Commerce was to be established between the people of the different states. The commerce of a free people is many times more valuable than that of slaves. Freemen produce and consume vastly more than slaves. They have therefore more to buy and more to sell. Hence the free states have a direct pecuniary interest in the civil freedom of all the other states. Commerce between free and slave states is not reciprocal or equal. Who can measure the increase that would have been made to the industry and prosperity of the free states, if all the slaves in the country had been freemen, with all the wants and energies of freemen? And their masters had had all the thrift, industry, frugality and enterprise of men who depend upon their own labor, instead of the labor of slaves, for their prosperity? Great Britain thought it policy to carry on a seven years' war against us principally to secure to herself the control and benefits of the commerce of three millions of people and their posterity. But we now have nearly or quite the same number of slaves within our borders, and yet we think that commerce with them and their posterity is a matter with which we have no concern; that there is "no propriety" in that provision of the national constitution, which requires that the general government—which we have invested with the exclusive control of all commerce among the several states—should secure to these three millions the right of traffic with their fellow men, and to their fellow men the right of traffic with them, against the impertinent usurpations and tyranny of subordinate governments, that have no constitutional right to interfere in the matter.

Again. The slave states, in proportion to their population, contribute nothing like an equal or equitable share to the aggregate of national wealth. It would probably be within the truth to say that, in proportion to numbers, the people of the free states have contributed ten times as much to the national wealth as the people of the slave states. Even for such wealth as the culture of their great staple, cotton, has added to the nation, the south are indebted principally, if not entirely, to the inventive genius of a single northern man.[26] The agriculture of the slave states is carried on with rude and clumsy implements; by listless, spiritless and thriftless laborers; and in a manner speedily to wear out the natural fertility of the soil, which fertility slave cultivation seldom or never replaces. The mechanic arts are comparatively dead among them. Invention is utterly dormant. It is doubtful whether either a slave or a slave holder has ever invented a single important article of labor-saving machinery since the foundation of the government. And they have hardly had the skill or enterprise to apply any of those invented by others. Who can estimate the loss of wealth to the nation from these causes alone? Yet we of the free states give to the south a share in the incalculable wealth produced by our inventions and labor-saving machinery, our steam engines, and cotton gins, and manufacturing machinery of all sorts, and yet say at the same time that we have no interest, and that there is "no propriety" in the constitutional guaranty of that personal freedom to the people of the south, which would enable them to return us some equivalent in kind.

For the want, too, of an enforcement of this guaranty of a republican form of government to each of the states, the population of the country, by the immigration of foreigners, has no doubt been greatly hindered. Multitudes almost innumerable, who would have come here, either from a love of liberty, or to better their conditions, and given the country the benefit of their talents, industry and wealth, have no doubt been dissuaded or deterred by the hideous tyranny that rides triumphant in one half of the nation, and extends its pestiferous and detested influence over the other half.

Socially, also, we have an interest in the freedom of all the states. We have an interest in free personal intercourse with all the people living under a common government with ourselves. We wish to be free to discuss, with any and all of them, all the principles of liberty and all the interests of humanity. We wish, when we meet a fellow man, to be at liberty to speak freely with him of his and our condition; to be at liberty to do him a service; to advise with him as to the means of improving his condition; and, if need be, to ask a kindness at his hands. But all these things are incompatible with slavery. Is this such an union as we bargained for? Was it "nominated in the bond," that we should be cut off from these the common rights of human nature? If so, point to the line and letter, where it is so written. Neither of them are to be found. But the contrary is expressly guarantied against the power of both the governments, state and national; for the national government is prohibited from passing any law abridging the freedom of speech and the press, and the state governments are prohibited from maintaining any other than a republican form of government, which of course implies the same freedom.

The nation at large have still another interest in the republicanism of each of the states; an interest, too, that is indicated in the same section in which this republicanism is guarantied. This interest results from the fact that the nation are pledged to "protect" each of the states "against domestic violence." Was there no account taken—in reference either to the cost or the principle of this undertaking—as to what might be the character of the state governments, which we are thus pledged to defend against the risings of the people? Did we covenant, in this clause, to wage war against the rights of man? Did we pledge ourselves that those, however few, who might ever succeed in getting the government of a state into their hands, should thenceforth be recognized as the legitimate power of the state, and be entitled to the whole force of the general government to aid them in subjecting the remainder of the people to the degradation and injustice of slavery? Or did the nation undertake only to guarantee the preservation of "a republican form of government" against the violence of those who might prove its enemies? The reason of the thing, and the connexion, in which the two provisions stand in the constitution, give the answer.

We have yet another interest still, and that no trivial one, in the republicanism of the state governments; an interest indicated, too, like the one last mentioned, in the very section in which this republicanism is assured. It relates to the defence against invasion. The general government is pledged to defend each of the states against invasion. Is it a thing of no moment, whether we have given such a pledge to free or to slave states? Is there no difference in the cost and hazard of defending one or the other? Is it of no consequence to the expense of life and money, involved in this undertaking, whether the people of the state invaded shall be united, as freemen naturally will be, as one man against the enemy? Or whether, as in slave states, half of them shall be burning to join the enemy, with the purpose of satisfying with blood the long account of wrong that shall have accrued against their oppressors? Did Massachusetts—who during the war of the revolution furnished more men for the common defence, than all the six southern states together—did she, immediately on the close of that war, pledge herself, as the slave holders would have it, that she would lavish her life in like manner again, for the defence of those whose wickedness and tyranny in peace should necessarily multiply their enemies and make them defenceless in war? If so, on what principle, or for what equivalent, did she do it? Did she not rather take care that the guaranty for a republican government should be inserted in the same paragraph with that for protection against invasion, in order that both the principle and the extent of the liability she incurred, might distinctly appear?

The nation at large, then, as a political community under the constitution, have both interests and rights, and both of the most vital character, in the republicanism of each of the state governments. The guaranty given by the national constitution, securing such a government to each of the states, is therefore neither officious nor impertinent. On the contrary, this guaranty was a sine qua non to any national contract of union; and the enforcement of it is equally indispensable, if not to the continuance of the union at all, certainly to its continuance on any terms that are either safe, honorable or equitable for the north.

This guaranty, then, is not idle verbiage. It is full of meaning. And that meaning is not only fatal to slavery itself, but it is fatal also to all those pretences, constructions, surmises and implications, by which it is claimed that the national constitution sanctions, legalizes, or even tolerates slavery.