The constitution of the United States was intentionally created as a completely godless document.
In these transcripts of her American Atheist Radio programs, Dr. Madalyn Murray O'Hair tells us about Freedom of Religion in Colonial America, American Deism, Rewriting of History by Christians, The Christianity of our Founding as a Nation, Free thought in American Historical Documents, Free thought Organizations in the Early U.S., Thomas Paine - American Deist and Freethinker, Colonel Ethan Allen, James Madison's Memorial and Remonstrance Against Religious Assessments, Jefferson's Idea of Religious Freedom, and Jefferson on Christianity.
Dr. O'Hair also presents two handwritten facsimiles of Lincoln's Gettysburg Address in which the phrase "under God" is not present.