How are Uncle Tom's Cabin and john brown's raid related to the civil war?

Uncle Tom's Cabin, written by Harriet Beecher Stowe, brought attention to the horrors of slavery and contributed to the abolitionist movement, fueling tensions that led to the Civil War. John Brown's raid on Harper's Ferry in 1859 was a pivotal event that further intensified the divide between North and South, demonstrating the violent disagreements over slavery that ultimately escalated into the Civil War.