economic The first and most important point is that the Civil War was expensive. In 1860 the U.S. national debt was $65 million.
Political The Civil war had profound effects on the the United States and the Confederacy in economic, political, and social. The war had different effects depending on the region which can be divided by effect on the south, north, and west.
The invention of the cotton gin.
This literary device is an example of "foreshadowing" - an indication of how future events will be effected.