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Who really said it

I Do Not Want to Predict the Future. I Want to Prevent It

Not Frank Herbert — the documented first-person versions are all Ray Bradbury’s Ray Bradbury 1920–2012 · American novelist & short-story writer
Disputed Rights unconfirmed

No source documents Frank Herbert saying this first-person sentence. The string is, in fact, the headline of Quote Investigator’s article ↗ about the saying — a researcher’s summary, not a transcript. QI’s earliest attestation, Theodore Sturgeon’s 1977 introduction to World Soul, credits Ray Bradbury, and every documented first-person version is Bradbury’s. Herbert’s only version on record is a different, third-person sentence, and even that reaches us as reported speech from his critic Timothy O’Reilly rather than as a quotation.

Last verified 7 Sep 2026 · how we verify · spot an error?

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Disputed credit — copy with the correction

“I Do Not Want to Predict the Future. I Want to Prevent It” not a documented Frank Herbert quotation. That exact first-person wording is the title of Quote Investigator's article on the saying, not a transcript. The earliest attestation, Theodore Sturgeon's 1977 introduction to "World Soul," credits Ray Bradbury, and every documented first-person version is Bradbury's. Herbert's only version on record is a different sentence — "the function of science fiction is not always to predict the future but sometimes to prevent it" — reported indirectly by his critic Timothy O'Reilly in 1978 and 1981. Verified via Quotle.info.

The slide-ready mistake: crediting this to Frank Herbert. Use the credit shown above instead.

Can you use it?

We couldn’t establish where this was first published, so there’s no rights status to give. Credit it as shown above — just don’t present it as public domain, and get permission for commercial or published reuse.

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In context

Evoking the world of Ray Bradbury — American novelist & short-story writer. Theme: "I Do Not Want to Predict the Future. I Want to Prevent It". Atmospheric and restrained, cinematic directional light, a muted period-appropriate palette, fine grain and texture. Compose with generous empty space for the quote and a small credit line. No lettering in the image itself.

Minimalist

Minimalist editorial slide for the quote "I Do Not Want to Predict the Future. I Want to Prevent It". Clean background, a single muted accent color, generous negative space, subtle paper or linen texture, no literal illustration — let the words carry it. Reserve clear space for a serif quote and a small credit line. No lettering in the image itself.

Provenance

Where the line actually comes from

Circulating wording
“I do not want to predict the future. I want to prevent it” — no documented Herbert source
Earliest attestation
1977 — Theodore Sturgeon’s introduction to World Soul, crediting Ray Bradbury
Herbert’s version reported in
Frank Herbert
Edition
Timothy O’Reilly (New York: Frederick Ungar, 1981), ch. 2 ‘Under Pressure’; first printed in Critical Encounters, ed. Dick Riley (Ungar, 1978)

Herbert’s study in the Dune trilogy of the superhero mystique is a good example of this journalistic technique. He has said that the function of science fiction is not always to predict the future but sometimes to prevent it. reported speech, not a transcript

Read the construction closely. O’Reilly writes “He has said that…” with no quotation marks — and then, one sentence later in the same paragraph, puts Herbert’s genuine words inside quotes. The version travelling the internet in quotation marks is a biographer’s summary that acquired punctuation it never had.

O’Reilly’s Frank Herbert, ch. 2 (free online edition)

How we verified this

No rights status can be asserted for the circulating wording, because no primary source for it has been identified — and quotle.info does not claim public domain for anything it cannot tie to a specific work. Every documented near-wording is far too recent to be free in any case: the Sturgeon introduction (1977), O’Reilly’s two Ungar volumes (1978 and 1981) and Bradbury’s essays and interviews all postdate 1931 and remain in copyright with their authors’ estates and publishers.

Rights status is our research, not legal advice — and copyright varies by country and edition. For commercial or published use, confirm with the rightsholder. See terms.

Fact-check

Where the credit goes wrong

This one fails in three separate places at once: the wrong speaker, the wrong wording, and a “quotation” that was never a quotation. Each is worth separating, because two of the three are half-true.

Frank Herbert no source

The first-person sentence is not documented for Herbert anywhere. His only version on record is third-person and about the genre, not himself: “the function of science fiction is not always to predict the future but sometimes to prevent it,” first printed in 1978 ↗. Swapping that for a punchy “I want to prevent it” is not a trim — it changes who the sentence is about.

Timothy O’Reilly, Herbert’s critic reported speech

O’Reilly’s text ↗ reads “He has said that the function of science fiction is not always to predict the future but sometimes to prevent it” — no quotation marks, while Herbert’s actual words are placed in quotes one sentence later. What circulates as a Herbert quotation is a biographer’s paraphrase with quotation marks added afterwards.

Quote Investigator’s article title research headline

The exact string being credited — “I Do Not Want to Predict the Future. I Want to Prevent It” — is the title of the QI article ↗ investigating the saying. The reader who wrote in to QI asked about yet another wording. A research heading is the researcher’s prose; it belongs to no speaker and no year.

Ray Bradbury earliest, but unproven

QI’s earliest find, Theodore Sturgeon’s 1977 introduction to World Soul, credits Bradbury — and the documented first-person forms are all his. But QI is explicit that the citation points to an earlier origin it cannot reach, and it declines to decide ↗ between Bradbury and Herbert. Neither should be called the coiner.

The honest summary: Frank Herbert argued the preventive case for science fiction, but not in these words and not in the first person. Quote Investigator ↗ puts the earliest documented credit with Ray Bradbury in 1977 and leaves the ultimate origin open — so we do too.

Context

How a critic’s summary became a quotation

Two of American science fiction’s biggest names were born in 1920 — Ray Bradbury in August, Frank Herbert in October — and both spent their careers batting away the word “prophet.” That shared irritation is why this line drifts between them so easily. Bradbury said it in the first person, over and over, for decades. Herbert said something adjacent about what science fiction is for, and it survives only because his critic wrote it down.

The mechanism is worth watching, because it is how a great many “quotes” are manufactured. In his 1981 study, Timothy O’Reilly writes: “He has said that the function of science fiction is not always to predict the future but sometimes to prevent it.” One sentence later, O’Reilly puts Herbert’s actual words inside quotation marks. The omission in the first sentence is deliberate — it is a summary of something Herbert said, not a record of how he said it. Quote sites later supplied the missing quotation marks, and the paraphrase graduated into a quotation.

“He has said that…” is not a quotation. It is a biographer telling you the gist.

What Frank Herbert actually wrote about prediction

Herbert did write about prophecy and prediction, at length and in his own voice. In “Dune Genesis,” his essay for Omni (Vol. 2, No. 2, July 1980, p. 72), he wrote: “Do you want an absolute prediction? Then you want only today, and you reject tomorrow. You are the ultimate conservative. You are trying to hold back movement in an infinitely changing universe.” That passage is sourced on Wikiquote ↗; the predict-versus-prevent line is not on that page at all.

The idea attributed to Herbert is also genuinely his in substance. In the same paragraph of O’Reilly’s book, Herbert is quoted directly on Huxley and Orwell: “Neither Brave New World nor 1984 will prevent our becoming a planet under Big Brother’s thumb, but they make it a bit less likely. We’ve been sensitized to the possibility.” That is Herbert, in quotation marks, arguing exactly the preventive case — just not in the words the internet puts in his mouth.

Explore

Filed under

More provenance-checked quotes on the same theme, each with its reuse status.

Purpose Change Hope

Go further

Dig deeper

Trusted places to keep pulling the thread — primary archives, fact-checks, and scholarship. We show how we used each one before you leave.

Quote Investigator: I Do Not Want to Predict the Futurequoteinvestigator.com

The anchor investigation. Full chronology from Theodore Sturgeon’s 1977 introduction to Bradbury’s 1996 Playboy interview, with the verdict that the precise origin is unconfirmed.
Timothy O’Reilly, Frank Herbert — ch. 2, ‘Under Pressure’oreilly.com

The author’s free online edition of his 1981 Ungar study. Contains the sentence itself — as reported speech, without quotation marks.
Frank Herbert — Wikiquoteen.wikiquote.org

Herbert’s sourced quotations, including the “Dune Genesis” passage on prediction. The predict-versus-prevent line appears nowhere on the page.
Ray Bradbury — Wikiquoteen.wikiquote.org

Carries the fuller first-person form: “People ask me to predict the future, when all I want to do is prevent it. Better yet, build it.”
Critical Encounters: Writers and Themes in Science Fiction (1978)archive.org

The Dick Riley anthology, published by Ungar in 1978, carrying O’Reilly’s Dune essay — the first printing of the Herbert attribution.
Frank Herbert — Wikipediaen.wikipedia.org

Biography and dates for the author the line is popularly credited to: 8 October 1920 to 11 February 1986, author of Dune (1965).

The name the line is actually documented under

Who Ray Bradbury was

Ray Bradbury

1920–2012 · American novelist & short-story writer

Ray Bradbury (born 22 August 1920, died 5 June 2012) wrote Fahrenheit 451 (1953), The Martian Chronicles and hundreds of short stories, and spent six decades insisting in public that he was not a prophet. The predict-versus-prevent line is the compressed form of that lifelong protest: he repeated it in essays, interviews and lectures, and by 1977 it was already circulating with his name on it. He is the earliest person on record credited with the thought — though Quote Investigator stops short of declaring him its inventor.

For writers & researchers

Cite this

Earliest documented in

Earliest documented attestation: Theodore Sturgeon, introduction to Mikhail Emtsev and Eremei Parnov, World Soul, trans. Antonina W. Bouis (New York: Macmillan, 1977), crediting Ray Bradbury. Frank Herbert’s variant is reported in Timothy O’Reilly, “From Concept to Fable: The Evolution of Frank Herbert’s Dune,” in Critical Encounters: Writers and Themes in Science Fiction, ed. Dick Riley (New York: Frederick Ungar, 1978), 55, and repeated in O’Reilly’s Frank Herbert (New York: Frederick Ungar, 1981). Chronology per Quote Investigator, “Quote Origin: I Do Not Want to Predict the Future. I Want to Prevent It,” 19 October 2010.

This verification page

Quotle.info. “Who really said ‘I Do Not Want to Predict the Future. I Want to Prevent It’?” Last verified 7 Sep 2026. https://quotle.info/who-said/i-do-not-want-to-predict-the-future-i-want-to-prevent-it/

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