What made Harriet Beecher Stowe a leading figure in the antislavery cause Apex?

Harriet Beecher Stowe became a leading figure in the antislavery cause due to the massive impact of her novel "Uncle Tom's Cabin." The book's emotional narrative exposed the cruelty of slavery and galvanized support for the abolitionist movement. Stowe's work humanized the plight of enslaved individuals and influenced public opinion on the issue of slavery.