Englishmen at that time and since have found a difficulty in grasping the precise cause of the war that followed. Of those who were inclined to sympathise with the North, some regarded the war as being simply about slavery, and, while unhesitatingly opposed to slavery, wondered whether it was right to make war upon it; others, regarding it as a war for the Union and not against slavery at all, wondered whether it was right to make war for a Union that could not be peaceably maintained. Now it is seldom possible to state the cause of a war quite candidly in a single sentence, because as a rule there are on each side people who concur in the final rupture for somewhat different reasons. But, in this case, forecasting a conclusion which must be examined in some detail, we can state the cause of war in a very few sentences. If we ask first what the South fought for, the answer is: the leaders of the South and the great mass of the Southern people had a single supreme and all-embracing object in view, namely, to ensure the permanence and, if need be, the extension of the slave system; they carried with them, however, a certain number of Southerners who were opposed or at least averse to slavery, but who thought that the right of their States to leave the Union or remain in it as they chose must be maintained. If we ask what the North fought for, the answer is: A majority, by no means overwhelming, of the Northern people refused to purchase the adhesion of the South by conniving at any further extension of slavery, and an overwhelming majority refused to let the South dissolve the Union for slavery or for any other cause. The issue about slavery, then, became merged in another issue, concerning the Union, which had so far remained in the background.