Genuinely Thoreau, and traceable to the page. The sentence appears in his essay “Walking,” first published in The Atlantic Monthly for June 1862 and collected the next year in Excursions, where it reads: “… what I have been preparing to say is, that in Wildness is the preservation of the World.” What goes wrong in circulation is one word — Thoreau wrote Wildness, a quality, not wilderness, a place.
“In wildness is the preservation of the world” Henry David Thoreau, "Walking," The Atlantic Monthly, June 1862 — collected in Excursions (Boston: Ticknor and Fields, 1863), p. 185. Original wording: "that in Wildness is the preservation of the World." · Verbatim: “The West of which I speak is but another name for the Wild; and what I have been preparing to say is, that in Wildness is the preservation of the World.”
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Provenance
The source
Work
“Walking” (essay)
First published
The Atlantic Monthly, Vol. IX, No. LVI, June 1862, pp. 657–674
Collected
Excursions (Boston: Ticknor and Fields, 1863), p. 185
Origin
Grew out of the lecture “The Wild,” Concord Lyceum, 23 April 1851
The West of which I speak is but another name for the Wild; and what I have been preparing to say is, that in Wildness is the preservation of the World. Every tree sends its fibres forth in search of the Wild. The cities import it at any price. Men plough and sail for it. From the forest and wilderness come the tonics and barks which brace mankind.
Excursions, 1863, p. 185
Both the 1862 magazine appearance and the 1863 first book edition print the line mid-sentence, with a capital W on “Wildness”; the 1863 setting also capitalises “World.” The familiar standalone form simply lifts the clause and lowercases it.
“Walking” was first published in The Atlantic Monthly in June 1862 and collected in Excursions in 1863 — both far earlier than the 1931 United States public-domain cutoff, and Thoreau died in 1862. The essay is written in English, so no translation copyright is in play. The text is freely reproducible.
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
What actually goes wrong
The name on this one is right. What travels wrong is the wording — and there is a rival version by a different conservationist entirely.
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Wording“In wilderness is the preservation of the world” misquote
The Walden Woods Project lists this as a straight misquotation: the correct quotation from “Walking” reads “in Wildness.” It notes the wrong version “appeared in a few minor publications of the first half of the twentieth century but was legitimized and propagated in Perry Miller’s classic, widely-used anthology, The American Transcendentalists, Their Prose and Poetry (Garden City, NY: Doubleday, 1956) p. 146” (Walden Woods Project ↗).
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WordingAldo Leopold — “In wildness is the salvation of the world” someone else's line
That version is Leopold’s, not Thoreau’s. The Walden Woods Project traces it to A Sand County Almanac and Sketches Here and There (London: Oxford University Press, 1949) p. 133, where Leopold wrote: “Perhaps this is behind Thoreau’s dictum: In wildness is the salvation of the world” (Walden Woods Project ↗).
Geologist Robert M. Thorson of the University of Connecticut argues the famous line “was cherry-picked from its original context, conflates wildness with wilderness and predates Thoreau’s later, more nuanced insights about wildness” (The Conversation ↗). In the essay the sentence caps a passage about walking west, not a plea for roadless land.
✓Thoreau’s own sentence, as first printed in book form: “The West of which I speak is but another name for the Wild; and what I have been preparing to say is, that in Wildness is the preservation of the World” — Excursions (Boston: Ticknor and Fields, 1863), p. 185 ↗.
Context
Why it mattered
The line did not begin as a slogan. It began as a lecture — “The Wild,” delivered at the Concord Lyceum on 23 April 1851 — which Thoreau gave repeatedly and reworked for a decade, holding it back from print to protect its value on the lecture circuit. Near the end of his life he sold the essay to The Atlantic Monthly, and it ran in the issue of June 1862, after his death on 6 May that year (Digital Thoreau ↗).
A century on it had become, in the words of UConn geologist Robert M. Thorson, “a guiding mantra for the American environmental movement, adopted by the Sierra Club as an unofficial motto and launched into the cultural stratosphere via bumper stickers, T-shirts and posters” (The Conversation ↗). Somewhere in that journey, a quality Thoreau found in a bugle call, a crab apple and a friend’s conversation got rewritten as a roadless area on a map.
Thoreau wrote “Wildness” — a quality. The bumper-sticker version says “wilderness” — a place.
How the correct wording got back into circulation
The Sierra Club itself published the accurate version as a title: In Wildness Is the Preservation of the World, pairing Thoreau’s words with Eliot Porter’s colour photographs (San Francisco: Sierra Club, 1962). The book is catalogued at the Internet Archive ↗ under Thoreau’s name with Porter as contributor.
Read in context, the sentence is not primarily about protecting land at all. It arrives as the punchline to a passage about walking westward — “The West of which I speak is but another name for the Wild” — and is followed immediately by trees sending fibres in search of the Wild and cities importing it at any price.
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Filed under
More provenance-checked quotes on the same theme, each with its reuse status.
1817–1862 · American naturalist, essayist & philosopher
Born in Concord, Massachusetts on 12 July 1817, Thoreau spent two years in a cabin at Walden Pond and turned the experiment into Walden, the founding text of American nature writing. He was a working surveyor and pencil-maker as much as a philosopher, and much of his best prose began life as lectures delivered to the Concord Lyceum. He died on 6 May 1862, and several of his finest essays — “Walking” among them — reached print only after his death.
For writers & researchers
Cite this
Cite this source
Henry David Thoreau, “Walking,” The Atlantic Monthly 9, no. 56 (June 1862): 657–674; collected in Excursions (Boston: Ticknor and Fields, 1863), 185.
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Quotle.info. “Who really said ‘In wildness is the preservation of the world’?” Last verified 7 Aug 2026. https://quotle.info/who-said/in-wildness-is-the-preservation-of-the-world/