Pietism (/ˈpaɪᵻtɪsm/, from the word piety) was an influential movement within Lutheranism that combined Lutheran emphasis on Biblical doctrine with the Reformed emphasis on individual piety and living a vigorous Christian life. Although it was active exclusively within Lutheranism, it had a tremendous impact on Protestantism worldwide, particularly in North America and Europe. Though Pietism shares an emphasis on personal behavior with the Puritan movement, and the two are often confused, there are important differences, particularly in the concept of the role of religion in government.