In 1536, John Calvin published 'Institutes of the Christian Religion,' a foundational text for Reformed theology. This work systematically outlined Calvin's beliefs, emphasizing concepts such as predestination, human depravity, and the sovereignty of God. Calvin's writings significantly influenced Protestant thought and the development of various Christian denominations, shaping religious practices and beliefs in Europe and beyond.

John Calvin's 'Institutes of the Christian Religion' shaped the tone of Puritan poetry, fostering a plain-spoken, introspective style that reflected spiritual anxiety. This theological framework influenced early American poets like Anne Bradstreet, who grappled with themes of faith, morality, and the human condition in their writings.