Why were slave owners so afraid of Harriet Beecher Stowe’s book Uncle Tom’s Cabin?

Uncle Tom’s Cabin is an abolitionist novel by Harriet Beecher Stowe that was published in serialized form in the United States in 1851–52 and in book form in 1852. It achieved wide-reaching popularity, particularly among white Northern readers, through its vivid dramatization of the experience of slavery.

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during world war ii