Massachusetts Bay Colony was founded in 1630 by Puritans who meant to build not merely a refuge but a model, a demonstration to England of what a fully reformed, disciplined Christian society could look like, governed by a covenant binding the whole community to God and to each other. That same discipline, turned toward suspicion instead of piety, produced the Salem witch trials of 1692, and the case of Tituba, an enslaved woman in the household of the afflicted girls' own minister and the first person accused, sits at the center of how historians now read the episode. Scholarship on the trial has traced how colonial records and later retellings reshaped Tituba's own origins and testimony to fit Puritan fears about outsiders as much as they recorded what she actually said, making her case a study in how a colony's fantasies about who threatened it could outrun the evidence entirely.
The same intensity that produced Salem eventually produced its own reaction from within. By the early nineteenth century, Boston and nearby Concord had become the center of a Unitarian break from Calvinist orthodoxy, rejecting the doctrine of innate depravity the Puritans had built their whole discipline around, and Transcendentalist writers working in the same towns pushed further still toward an individual, intuitive spirituality that owed almost nothing to the covenant theology of 1630. Catholic immigration then reshaped Boston again from outside the Puritan lineage altogether, first Irish after the 1840s famine and then Italian and Polish, building an archdiocese that by the twentieth century had eclipsed the descendants of the colony's own founders in size.