"Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions"
About this Quote
The sly cultural subtext is in “At first people didn’t like them too much.” He’s narrating a familiar cycle in high theory: the community’s aesthetic recoil (extra dimensions feel baroque, even desperate) followed by reluctant acceptance once the machinery proves useful. Witten frames the shift not as ideology but as engineering: dislike yields to benefit. That benefit is narrowly specified: not “explaining the universe,” but preserving string theory’s unifying capacity. It’s a rhetorically modest move that makes the claim harder to swat away as metaphysics.
Context matters: Witten, a central architect of string/M-theory and a rare bridge between physics and deep mathematics, is also defending a research program often criticized for being detached from experiment. By tying extra dimensions to internal necessity - the theory’s ability to reproduce known particle content and include gravity consistently - he offers a justification that’s less promotional than structural. The quiet wager is that coherence and unification are not optional virtues; they are the pressure points where reality eventually reveals itself, even if it does so in more dimensions than we can see.
Quote Details
| Topic | Science |
|---|---|
| Source | Help us find the source |
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Citation Formats
APA Style (7th ed.)
Witten, Edward. (2026, January 17). Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions. FixQuotes. https://fixquotes.com/quotes/technically-you-need-the-extra-dimensions-at-49366/
Chicago Style
Witten, Edward. "Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/technically-you-need-the-extra-dimensions-at-49366/.
MLA Style (9th ed.)
"Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/technically-you-need-the-extra-dimensions-at-49366/. Accessed 12 Feb. 2026.
