Summary in Seconds The lands that later became the United States were originally free of Old-World religions, but this changed when early settlers brought their faith with them and made it central to daily life, even as religious freedom remained limited under established churches. With the founding of the nation, the Constitution guaranteed freedom of belief, turning religion from an imposed system into a personal choice. Religious revivals such as the Great Awakening later brought faith closer to the people and tied it to social participation and reform. Over time, immigration expanded the religious landscape to include many traditions, leading