The North American Confederacy (NAC) is a fictional government in the alternate history created by L. Neil Smith in the novel The Probability Broach and sequels. It is patterned on the Articles of Confederation, but with a much greater emphasis on individual freedom, almost anarchical. As of the "start" of The Probability Broach in 1986, the NAC consisted of the entire continent of North America as well as parts of Antarctica, and colonies on the Moon, Mars and the major asteroids.