Overview
From early colonial days, when some English and German settlers came in search of religious freedom, America has been profoundly influenced by religion. That influence continues in American culture, social life, and politics. Several of the original Thirteen Colonies were established by settlers who wished to practice their own religion within a community of like-minded people: the Massachusetts Bay Colony was established by English Puritans (Congregationalists), Pennsylvania by British Quakers, Maryland by English Catholics, and Virginia by English Anglicans.
The text of the First Amendment to the country's Constitution states that "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances." It guarantees the free exercise of religion while also preventing the government from establishing a state religion. The Supreme Court has also interpreted this as preventing the government from having any authority in religion.
Read more about this topic: Religion In The United States