The film is often considered one of the best comedies ever made, as well as one of the greatest films of all time. In 1998, the American Film Institute ranked it twenty-sixth in its list of the best American movies (in the 2007 edition, the film ranked thirty-ninth), and in 2000, it was listed as number three on its list of the funniest American films. In 1989, the United States Library of Congress included "Dr. Strangelove" as one of the first twenty-five films selected for preservation in the National Film Registry for being "culturally, historically, or aesthetically significant".