How did studying at Daventry Academy influence Joseph Priestley’s religious beliefs?

At Daventry Academy, which Joseph Priestley entered in 1752, he received an education that profoundly shifted his theological perspective. While he was raised in a Calvinist environment, his time at the academy fostered his development into a "furious freethinker" regarding religion.1

This academic environment encouraged a rational approach to faith, leading Priestley to renounce traditional Calvinist doctrines such as original sin and the concept of atonement. Ultimately, his studies helped him embrace a rational form of Unitarianism, which rejected the Trinity and emphasized the perfectibility of man. This intellectual transition marked a significant departure from the beliefs of the Dissenters and the Church of England of his time.1