IT IS sometimes asked, with an air of seeming triumph, what inducements could the States have, if disunited, to make war upon each other? It would be a full answer to this question to say--precisely the same inducements which have, at different times, deluged in blood all the nations in the world. But, unfortunately for us, the question admits of a more particular answer. There are causes of differences within our immediate contemplation, of the tendency of which, even under the restraints of a federal constitution, we have had sufficient experience to enable us to form a judgment of what might be expected if those restraints were removed.