The Age of Slavery illustrates how black lives changed dramatically in the aftermath of the American Revolution. For free black people in places like Philadelphia, these years were a time of tremendous opportunity. But for most African Americans, this era represented a new nadir. King Cotton fueled the rapid expansion of slavery into new territories, and a Second Middle Passage forcibly relocated African Americans from the Upper South into the Deep South. Yet as slavery intensified, so did resistance. From individual acts to mass rebellions, African Americans demonstrated their determination to undermine and ultimately eradicate slavery in every state in the nation. Courageous individuals, such as Harriet Tubman, Richard Allen and Frederick Douglass, played a crucial role in forcing the issue of slavery to the forefront of national politics, helping to create the momentum that would eventually bring the country to war.