Why did more people join the abolitionist movement after the book, uncle tom's cabin was published?

He strength of Uncle Tom's Cabin is its ability to illustrate slavery's effect on families, and to help readers empathize with enslaved characters. Stowe's characters freely debated the causes of slavery, the Fugitive Slave Law, the future of freed people, what an individual could do, and racism. Writing in the 1950s, poet Langston Hughes called the book a "moral battle cry for freedom."