Answer:
The immense cost of life from the Civil War disillusioned Americans from their early 1800's idealism.
Step-by-step explanation:
Most of the famous literature from after the Civil War is called Realism. These writers turned away from Romanticism. The immense cost of life from the Civil War disillusioned Americans from their early 1800's idealism. Their plan was to portray life realistically (hence the name), and people as they were.