Harriet Beecher Stowe hated slavery. Yet she lived at a time when millions of black Americans were slaves. The gifted author realized she could help end the cruel practice by writing about it. So Harriet wrote a powerful story called Uncle's Tom's Cabin. Hundreds of thousands of Americans read Harriet's book. It made many Northerners change their minds about slavery. After reading Uncle Tom's Cabin, they wanted to fight for the freedom of slaves. Many people consider Harriet Beecher Stowe the most important writer of the 19th century because her words helped changed the course of history.