of Joe in Gulf—whose last name may be Greene, Gilead or Briggs). When Ayn Rand's novel The Fountainhead was published, Heinlein was very favorably impressed, as quoted in "Grumbles ..." and mentioned John Galt—the hero in Rand's Atlas Shrugged—as a heroic archetype in The Moon Is a Harsh Mistress. He was also strongly affected by the religious philosopher P. D. Ouspensky. Freudianism and psychoanalysis were at the height of their influence during the peak of Heinlein's career, and stories such as Time for the Stars indulged in psychological theorizing. However, he was skeptical about Freudianism, especially after a struggle with an editor who insisted on reading Freudian sexual symbolism into his juvenile novels. Heinlein was fascinated by the social credit movement in the 1930s. This is shown in Beyond This Horizon and in his 1938 novel For Us, the Living: A Comedy of Customs, which was finally published in 2003, long after his death. Pay it forward On that theme, the phrase "pay it forward", though it was already in occasional use as a quotation, was popularized by Robert A. Heinlein in his book Between Planets, published in 1951: He referred to this in a number of other stories, although sometimes just saying to pay a debt back by helping others, as in one of his last works, Job, a Comedy of Justice. Heinlein was a mentor to Ray Bradbury, giving him help and quite possibly passing on the concept, made famous by the publication of a letter from him to Heinlein thanking him. In Bradbury's novel Dandelion Wine, published in 1957, when the main character Douglas Spaulding is reflecting on his life being saved by Mr. Jonas, the Junkman: Bradbury has also advised that writers he has helped thank him by helping other writers. Heinlein both preached and practiced this philosophy; now the Heinlein Society, a humanitarian organization founded in his name, does so, attributing the philosophy to its various efforts, including Heinlein for Heroes, the Heinlein Society Scholarship Program, and Heinlein Society blood drives. Author Spider Robinson made repeated reference to the doctrine, attributing it to his spiritual mentor Heinlein. Influence and legacy Honorifics Heinlein is usually identified, along with Isaac Asimov and Arthur C. Clarke, as one of the three masters of science fiction to arise in the so-called Golden Age of science fiction, associated with John W. Campbell and his magazine Astounding. In the 1950s he