explain this in a simple way

The Civil War was a traumatic and destructive conflict that remains the bloodiest war in US history. Realism began around the end of the war in 1865. Rejecting romantic-era ideals that focused on allegorical characters, symbolic settings, and dramatic subjects, realism depicted ordinary people in everyday situations.
What aspects of the Civil War might have caused this dramatic shift in style, form, and thematic discourse in American literature?

The Civil War was a really intense and damaging war that happened in the United States. It was the deadliest war ever in the US. After the war, a style of writing called realism started becoming popular. Realism is different from the style of writing before the war because it focuses on showing regular people in their normal lives, instead of using symbols and dramatic storylines. The war probably had a big impact on the way people thought about things, so writers started wanting to show the truth and realness of everyday life in their stories.