To clarify some of these arguments with REAL (yes, imagine that) Historical Facts:
First, the opening shots of the war were fired on 9 January 1861, when the 'Star of the West' invaded the Waters of the by then Independent State of South Carolina in an attempt to resupply Ft. Sumpter, A 24-pounder battery manned by Cadets of the Citadel. The first shot was fired over her bow, when she refused to heed the warning, the ship itself was fired upon and a few additional batteries from around the harbour joined in. After sustaining minor damage, the offending vessel ceased her intrusion into South Carolinian waters and withdrew back out to sea. The liberation of the Fort that occured on 12 April 1861 was on account of the Union attempting to send a new garrison and supplies to the fort, and at the time of the assult Union Ships were stationed within the Waters of the Independent State of South Carolina in violation of her Sovereignty; the War was brought on by Naval invasions on the part of the United States, with the State of South Carolina (before the Confederacy was Formed) responding to them with appropriate force.
Second, the war was not over slavery, which can be proven by one simple historical fact. On 2 March 1861 the 36th Congress under the Control of Lincoln (which Excluded the Seven Original Confederate States by this time) passed the proposed 13th Amdnement to the Constitution of the United States by a 2/3rds majority in both Houses, an amendment that was intended to entice the Confederate States back into the Union and avoid war. The text of this Amendment?
'No Amendment shall be made to the Constitution which will authorize or give to Congress the power to abolish or interfere, within any state, with the domestic institutions thereof, including that of persons held to labor or service by the laws of said State.'
Not only does this amendment protect the Right of the States to Maintain Slave Labour, but undermines any attempt to pass any law, even a constitutional amdendment, that would violate this Right of the States. So why didn't the Confederacy take this protection of the particular institution? Had this amendment been made law, Slavery would be regarded as a States Rights issue even to this very day, and as long as the Republic endured. But the real issue was tariffs, the North wanted High tariffs to protect their fledgling industry, and the south wanted free trade to help their Agricultural Economy, which was one of the Most powerful export econonmies in the World at the Time; but the Majority of Northern States in Congress woudl still be able to pass heavy tariffs, even with slavery protected. Slavery was a secondary issue at best, the primary issue being tariffs (which was, incidentally, also at the centre of the nullification controversy of 1832 between South Carolina and the Federal Governemnt, and the biggest political issue of 19th Century America).
Finally, as I was challenged on this issue, if someone wishes to argue the Issue, I will defend the Particular Institution. Involuntary Servitude, while an unfortunate situation and less than ideal social institution, is not at all inherently immoral or unchristian. Nearly every Christian State from the time of the Empire, as well as Ancient Israel, maintained this instutution. It is an institution that neither Christ nor the Apostles Condemned, though it was all about them, and this lack of condemnation was not from lack of attention to the institution, for the relationship between masters and slaves was regulated by St. Paul. In this post-modern era of political correctness, it is easy for us to sit on our high moral horse and condemn those of past generations, even Saints of the Church via blanket statements, while ignoring the econmic and social necessities of the unfortunate but morally neutral institutions of Slavery; which our Emperor St. Justinian, beloved of God, defended in his Institutes as a merciful institution, allowing the State to spare the sword from Criminals and Enemies of the Empire who justly diserve death.