Original: Her novel Uncle Tom's Cabin (1852) depicted life for African-Americans under slavery; it reached millions as a novel and play, and became influential in the United States and United Kingdom.
Simplified: Stowe's novel Uncle Tom's Cabin (1852) showed the lives of African-Americans who were slaves. It was very popular as a novel and a play, and had a great influence in the United States and Britain, helping people who did not like slavery and making many people disagree with slavery.