http://www.sobran.com/articles/tyranny.shtml

excerpt:

The Civil War, or the War Between the States if you like, resulted from the suspicion that the North meant to use the power of the Union to destroy the sovereignty of the Southern states. Whether or not that suspicion was justified, the war itself produced that very result. The South was subjugated and occupied like a conquered country. Its institutions were profoundly remade by the federal government; the United States of America was taking on the character of an extensive, and highly centralized, empire. Similar processes were under way in Europe, as small states were consolidated into large ones, setting the stage for the tyrannies and gigantic wars of the twentieth century.