The Baptists were a dissenter sect that became especially popular in New England after the First Great Awakening. They diverged from Protestant belief mainly in insisting that only believers should be baptized, and that it should be done by immersion in water and not by sprinkling or pouring water, but they represented the most radical of the radical New Lights and were known for lay preaching and personal spirituality. Wheelock and most of his former students were more moderate New Lights and opposed this sort of radical Christianity. Occom, however, had many connections with Baptist ministers in central New York. On his preaching tour in 1774, he records visiting several Baptist ministers, largely white, and speaking to large crowds, sometimes in the woods. He also records meeting with a "Seven Day Baptist" minister. The Seventh Day or Sabbatarian Baptists differ from Baptist beliefs mainly in observing the Sabbath on Saturday, in accordance with the ten commandments. Baptist belief held a strong attraction for Native peoples because it protected their autonomy and embraced preaching and leadership by lay people. Divides over theology became problematic at Brothertown, where Occom’s moderate sect clashed with the more Baptist sect over whether or not to lease their land to Americans. After Occom’s death, Samuel Ashpo, a Baptist Mohegan minister known for his separatism, began spending more time at Brothertown and built up a substantial Baptist congregation there.

The Universalist Church was a Christian religious denomination that developed in America from Pietist and Anabaptist movements, inculding Quakers, Moravians, Methodists, Lutherans and others. Its defining theology is universal salvation, and thus it runs counter to the central Calvinist belief in predestination, in which some souls are predestined for damnation. As a Presbyterian, Occom held to the Calvinist view and vigorously disagreed doctrinally with adherents of Universalism. The first Universalist Church in America was founded by John Murray in Gloucester, MA in 1779, and in 1790 the Universalists adopted a a doctrinal statement and plan for church government. In 1961 the Universalists consolidated with the Unitarian Association to form the Unitarian Universalist Church.

Ballston is a town in central New York state, north of Albany. The area was occupied by Mohawk Indians, who resented the appropriation of their sacred grounds by European settlers. The first settlers, the MacDonald brothers, built a homestead on the west bank of Ballston Lake in 1763. Reverend Eliphalet Ball arrived in 1770 with his three sons and members of his congregation from Bedford, NY, bought the land from the MacDonalds, named it Ball's Town, and established a Presbyterian church there in 1771. Soon, settlers arrived from other parts of New England, New Jersey, Scotland and north of Ireland. In 1774, a stockaded fort was built in Ballston, which was attacked by the British and their Indian allies from Canada in 1780 and 1781. It became a town of Albany county in 1785 and was part of the religious circuit in upstate New York in which Occom travelled.

Long Island is an island located in southeast New York State. In 1824, historian Silas Wood claimed that 13 different tribes inhabited the island when the Dutch and English arrived in 1639: the Canarsie, the Rockaway, the Matinecock, the Merrick, the Massapequa, the Nissequoge, the Secatoag, the Seatuket, the Patchoag, the Corchaug, the Shinnecock, the Manhasset, and the Montaukett. This is the commonly accepted tribal history of Long Island, and Wood’s theory is taught in New York textbooks today. Yet, in 1992, historian John Strong challenged this dominant narrative, arguing that tribal systems did not develop on Long Island until after Europeans arrived. Based on Dutch and English colonists’ accounts, the Algonquian communities on western Long Island likely spoke the Delaware-Munsee dialect and those to the east spoke languages related to the southern New England Algonquian dialects. These indigenous peoples organized themselves by language and kinship, but beyond village systems and the occasional alliance, there existed no formal tribal structure. Rather, internal structures arose among the Montauks, the Shinnecocks, the Poospatucks, and the Matinnocks to cope with English settlers, and became integral to these peoples’ survival. Although new diseases and land negotiations severely encroached on the freedom of Long Island’s Native population, these groups that developed tribal structures retain a sense of community today. By the 18th century, much of the island had fallen into the hands of the English, who were the sole European power on Long Island once the Dutch relinquished their claims to the land after the second Anglo-Dutch War in 1664. During the Great Awakening of the 18th century, Occom spent 12 years serving as a missionary to the Montaukett Indians of Long Island, along with Presbyterian minister Azariah Horton. Today, the western half of the island is densely populated due to its proximity to Manhattan, and its eastern half is mainly devoted to resort towns. The Shinnecocks and the Poospatucks retain autonomous reservations on Long Island.

Samson Occom was a Mohegan leader and ordained Presbyterian minister. Occom began his public career in 1742, when he was chosen as a tribal counselor to Ben Uncas II. The following year, he sought out Eleazar Wheelock, a young Anglo-American minister in Lebanon, CT, in hopes of obtaining some education and becoming a teacher at Mohegan. Wheelock agreed to take on Occom as a student, and though Occom had anticipated staying for a few weeks or months, he remained with Wheelock for four years. Occom’s academic success inspired Wheelock to open Moor’s Indian Charity School in 1754, a project which gave him the financial and political capital to establish Dartmouth College in 1769. After his time with Wheelock, Occom embarked on a 12-year mission to the Montauk of Long Island (1749-1761). He married a Montauk woman, Mary Fowler, and served as both teacher and missionary to the Montauk and nearby Shinnecock, although he was grievously underpaid for his services. Occom conducted two brief missions to the Oneida in 1761 and 1762 before embarking on one of the defining journeys of his career: a fundraising tour of Great Britain that lasted from 1765 to 1768. During this journey, undertaken on behalf of Moor’s Indian Charity School, Occom raised £12,000 (an enormous and unanticpated amount that translates roughly to more than two-million dollars), and won wide acclaim for his preaching and comportment. Upon his return to Mohegan in 1768, Occom discovered that Wheelock had failed to adequately care for his family while he was gone. Additionally, despite the vast sums of money that he had raised, Occom found himself unemployed. Wheelock tried to find Occom a missionary position, but Occom was in poor health and disinclined to leave his family again after seeing the treatment with which they had met while he was in Britain. Occom and Wheelock’s relationship continued to sour as it became apparent to Occom that the money he had labored to raise would be going towards infrastructure at Dartmouth College, Wheelock’s new project, rather than the education of Native Americans. After the dissolution of his relationship with Wheelock, Occom became increasingly focused on the needs of the Mohegan community and increasingly vocal in criticizing Anglo-Americans’ un-Christian treatment of Native Americans. In September of 1772, he delivered his famous “Sermon on the Execution of Moses Paul,” which took Anglo-American spiritual hypocrisy as one of its major themes, and which went into four printings before the end of the year. In 1773, Occom became further disillusioned when the Mason Land Case was decided in favor of the Colony of Connecticut. The details of the Mason Case are complicated, but to summarize: the Colony of Connecticut had gained control of Mohegan land early in the 18th century under very suspect circumstances, and successfully fended off the Mohegan’s 70-year-long legal challenge. The conclusion of the case came as a blow to the Mohegans, and further convinced Occom of Anglo-American corruption. Along with David Fowler (Montauk Tribe), Occom's brother-in-law, and Joseph Johnson (Mohegan), Occom's son-in-law, Occom helped found Brothertown, an Indian tribe formed from the Christian Mohegans, Pequots, Narragansetts, Montauks, Tunxis, and Niantics. They eventually settled in Oneida country in upstate New York. Occom moved there with his family in 1789, spending the remaining years of his life serving as a minster to the Brothertown, Stockbridge, and Mohegan Indians. Harried by corrupt land agents, the Brothertown and Stockbridge groups relocated to the eastern shore of Lake Winnebago, though Occom died in 1792 before he could remove himself and his family there. Occom's writings and legacy have made him one of the best known and most eminent Native Americans of the 18th century and beyond.