The Declaration of Independence, written by Thomas Jefferson (1743-1826) in 1776, echoed principles that Jefferson, Franklin and John Adams had observed among the Iroquois such as human equality, the pursuit of happiness, government by the consent of the governed, and the power of public opinion to condition morality. The Declaration was also influenced by similar movements in Europe, especially the writings of Voltaire (who will be discussed in the next article).
In the late 18th century, America ratified the Constitution and then the Bill of Rights. The first amendment reads,
"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."In a letter to the Danbury Baptist Assocation January 1, 1802 Jefferson wrote:
"Believing with you that religion is a matter which lies solely between man and his God, that he owes account to none other for his faith or his worship, that the legislative powers of government reach actions only, and not opinions, I contemplate with sovereign reverence that act of the whole American people which declared that their legislature should 'make no law respecting an establishment of religion, or prohibiting the free exercise thereof,' thus building a wall of separation between church and State." (The Writings of Thomas Jefferson Memorial Edition, edited by Lipscomb and Bergh, 1903-04, 16:281)