Puritans were members of a religious and social movement of the 1500's and 1600's. The movement began in England and spread to America where it greatly influenced social, political, and religious institutions. Such religious denominations as Congregationalism and Unitarianism developed from Puritan beliefs.
Wilson, J. F. (2020). Puritans. In World Book Advanced. Retrieved from https://www.worldbookonline.com/advanced/article?id=ar452140
The Puritans were a group of English Reformed Protestants in the 16th and 17th centuries who sought to "purify" the Church of England from its "Catholic" practices, maintaining that the Church of England was only partially reformed.[1] (Wikipedia)