The Underground Railroad was a network of secret routes and safe houses established in the United States during the early to mid-19th century. It was used by enslaved African Americans primarily to escape into free states and from there to Canada. The network, primarily the work of free African Americans, was assisted by abolitionists and others sympathetic to the cause of the escapees. The slaves who risked capture and those who aided them are also collectively referred to as the passengers and conductors of the Railroad, respectively. Various other routes led to Mexico, where slavery had been abolished, and to islands in the Caribbean that were not part of the slave trade. An earlier escape route running south toward Florida, then a Spanish possession, existed from the late 17th century until approximately 1790. However, the network generally known as the Underground Railroad began in the late 18th century. It ran north and grew steadily until the Emancipation Proclamation was signed by President Abraham Lincoln. One estimate suggests that, by 1850, approximately 100,000 slaves had escaped to freedom via the network.

Quakers are people who belong to the Religious Society of Friends, a historically Protestant Christian set of denominations. Members of these movements are generally united by a belief in each human's ability to experience the light within or "answering that of God in every one". Some profess a priesthood of all believers inspired by the First Epistle of Peter. They include those with evangelical, holiness, liberal, and traditional Quaker understandings of Christianity. There are also Nontheist Quakers, whose spiritual practice does not rely on the existence of God. To differing extents, the Friends avoid creeds and hierarchical structures. In 2017, there were an estimated 377,557 adult Quakers, 49% of them in Africa.