The present government of the United States is not an Abolitionist government.  Abolitionists, in America, mean those who do not keep within the constitution; who demand the destruction (as far as slavery is concerned) of as much of it as protects the internal legislation of each State from the control of Congress; who aim at abolishing slavery wherever it exists, by force if need be, but certainly by some other power than the constituted authorities of the Slave States.  The Republican party neither aim nor profess to aim at this object.  And when we consider the flood of wrath which would have been poured out against them if they did, by the very writers who now taunt them with not doing it, we shall be apt to think the taunt a little misplaced.  But though not an Abolitionist party, they are a Free-soil party.  If they have not taken arms against slavery, they have against its extension.  And they know, as we may know if we please, that this amounts to the same thing.  The day when slavery can no longer extend itself, is the day of its doom.  The slave-owners know this, and it is the cause of their fury.  They know, as all know who have attended to the subject, that confinement within existing limits is its death-warrant.  Slavery, under the conditions in which it exists in the States, exhausts even the beneficent powers of nature.  So incompatible is it with any kind whatever of skilled labor, that it causes the whole productive resources of the country to be concentrated on one or two products, cotton being the chief, which require, to raise and prepare them for the market, little besides brute animal force.  The cotton cultivation, in the opinion of all competent judges, alone saves North American slavery; but cotton cultivation, exclusively adhered to, exhausts in a moderate number of years all the soils which are fit for it, and can only be kept up by travelling farther and farther westward.  Mr. Olmsted has given a vivid description of the desolate state of parts of Georgia and the Carolinas, once among the richest specimens of soil and cultivation in the world; and even the more recently colonized Alabama, as he shows, is rapidly following in the same downhill track.  To slavery, therefore, it is a matter of life and death to find fresh fields for the employment of slave labor.  Confine it to the present States, and the owners of slave property will either be speedily ruined, or will have to find means of reforming and renovating their agricultural system; which cannot be done without treating the slaves like human beings, nor without so large an employment of skilled, that is, of free labor, as will widely displace the unskilled, and so depreciate the pecuniary value of the slave, that the immediate mitigation and ultimate extinction of slavery would be a nearly inevitable and probably rapid consequence.