The Moon Is a Harsh Mistress
In 1972, "Libertarian Party" was chosen as the party's name, selected over "New Liberty Party". The first official slogan of the Libertarian Party was "There ain't no such thing as a free lunch" (abbreviated "TANSTAAFL"), a phrase popularized by Robert A. Heinlein in his 1966 novel "The Moon Is a Harsh Mistress", sometimes dubbed "a manifesto for a libertarian revolution". The slogan of the party is "The Party of Principle".