structural:expansion
Reform-movement links

Spiritualists often set March 31, 1848, as the beginning of their movement. On that date, Kate and Margaret Fox, of Hydesville, New York, reported that they had made contact with a spirit that was later claimed to be the spirit of a murdered peddler whose body was found in the house, though no record of such a person was ever found. The spirit was said to have communicated through rapping noises, audible to onlookers. The evidence of the senses appealed to practically minded Americans, and the Fox sisters became a sensation. As the first celebrity mediums, the sisters quickly became famous for their public séances in New York. However, in 1888 the Fox sisters admitted that this contact with the spirit was a hoax, though shortly afterward they recanted that admission.

Amy and Isaac Post, Hicksite Quakers from Rochester, New York, had long been acquainted with the Fox family, and took the two girls into their home in the late spring of 1848. Immediately convinced of the veracity of the sisters' communications, they became early converts and introduced the young mediums to their circle of radical Quaker friends.

Consequently, many early participants in spiritualism were radical Quakers and others involved in the mid-nineteenth-century reforming movement. These reformers were uncomfortable with the more mainstream churches because those churches did little to fight slavery and even less to advance the cause of women's rights.

Such links with reform movements, often radically socialist, had already been prepared in the 1840s, as the example of Andrew Jackson Davis shows. After 1848, many socialists became ardent spiritualists or occultists.

The most popular trance lecturer prior to the American Civil War was Cora L. V. Scott (1840–1923). Young and beautiful, her appearance on stage fascinated men. Her audiences were struck by the contrast between her physical girlishness and the eloquence with which she spoke of spiritual matters, and found in that contrast support for the notion that spirits were speaking through her. Cora married four times, and on each occasion adopted her husband's last name. During her period of greatest activity, she was known as Cora Hatch.

Another spiritualist was Achsa W. Sprague, who was born November 17, 1827, in Plymouth Notch, Vermont. At the age of 20, she became ill with rheumatic fever and credited her eventual recovery to intercession by spirits. An extremely popular trance lecturer, she traveled about the United States until her death in 1861. Sprague was an abolitionist and an advocate of women's rights.

Another spiritualist and trance medium prior to the Civil War was Paschal Beverly Randolph (1825–1875), a man of mixed race, who also played a part in the abolitionist movement. Nevertheless, many abolitionists and reformers held themselves aloof from the spiritualist movement; among the skeptics was abolitionist Frederick Douglass.

Another social reform movement with significant spiritualist involvement was the effort to improve conditions of Native Americans. Kathryn Troy writes in a study of Indian ghosts in seances:

Undoubtedly, on some level spiritualists recognized the Indian spectres that appeared at seances as a symbol of the sins and subsequent guilt of the United States in its dealings with Native Americans. Spiritualists were literally haunted by the presence of Indians. But for many that guilt was not assuaged: rather, in order to confront the haunting and rectify it, they were galvanized into action. The political activism of spiritualists on behalf of Indians was thus the result of combining white guilt and fear of divine judgment with a new sense of purpose and responsibility.