--- title: "24 John L. Casti Quotes - Famous Mathematician (Newton to Aristotle)" description: "John L. Casti is an author, complexity scientist, systems theorist, mathematician and entrepreneur. Browse 24 John L. Casti quotes." image: "https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b029/author-john-l-casti-24628.jpg" --- ![Portrait of John L. Casti](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b029/author-john-l-casti-24628.jpg) # John L. Casti (1943) Mathematician United States **24** quotes in **238** categories Rate this collection: ★ ★ ★ ★ ★ No ratings yet John L. Casti is a mathematician from the United States, best known for *Newton to Aristotle*. ## Quick Facts About John L. Casti Born June 16, 1943 Nationality United States Profession Mathematician Notable works Newton to Aristotle ## About John L. Casti John L. Casti is an author, complexity scientist, systems theorist, mathematician and entrepreneur. ## Quotes by John L. Casti > [The unfolding time for the end of globalization or a worldwide deflation is much longer, certainly measured in years, if not decades.](https://sms4smile.com/quotes/john-l-casti/the-unfolding-time-for-the-end-of-globalization-or-a-worldwide/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Decades](https://sms4smile.com/quotes/about/decades/) [Image](https://sms4smile.com/quotes/i/a99/john-l-casti-24628_decades_the-unfolding-time-for-the-end-of-global_3160339.png) > [I do not believe that there is any person, method, or tool that can consistently and reliably predict specific human events, X-…](https://sms4smile.com/quotes/john-l-casti/i-do-not-believe-that-there-is-any-person-method-or-tool-that-can/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Believe](https://sms4smile.com/quotes/about/believe/) [Image](https://sms4smile.com/quotes/i/aa1/john-l-casti-24628_believe_i-do-not-believe-that-there-is-any-perso_905197.png) > [Reality is a wave function traveling both backward and forward in time.](https://sms4smile.com/quotes/john-l-casti/reality-is-a-wave-function-traveling-both-backward-and-forward-in-time/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Function](https://sms4smile.com/quotes/about/function/) [Image](https://sms4smile.com/quotes/i/e5c/john-l-casti-24628_function_reality-is-a-wave-function-traveling-bot_2026911.png) > [The world is awash in more debt than there is money enough in the world to liquidate it.](https://sms4smile.com/quotes/john-l-casti/the-world-is-awash-in-more-debt-than-there-is-money-enough-in-the/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Debt](https://sms4smile.com/quotes/about/debt/) [Image](https://sms4smile.com/quotes/i/de9/john-l-casti-24628_debt_the-world-is-awash-in-more-debt-than-the_3207231.png) > [I believe is that we can forecast the "changing landscape of context," and thus get insight into when we are entering the…](https://sms4smile.com/quotes/john-l-casti/i-believe-is-that-we-can-forecast-the-changing-landscape-of-context/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Believe](https://sms4smile.com/quotes/about/believe/) [Image](https://sms4smile.com/quotes/i/d73/john-l-casti-24628_believe_i-believe-is-that-we-can-forecast-the-ch_1979572.png) > [I think that in the immediate aftermath of a superhuman machine intelligence revealing itself, most people would feel very threatened but take…](https://sms4smile.com/quotes/john-l-casti/i-think-that-in-the-immediate-aftermath-of-a-superhuman-machine/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Aftermath](https://sms4smile.com/quotes/about/aftermath/) [Image](https://sms4smile.com/quotes/i/772/john-l-casti-24628_aftermath_i-think-that-in-the-immediate-aftermath_713682.png) > [Once the reality sets in of a superhuman intelligence being in control of every aspect of the infrastructures we rely upon for…](https://sms4smile.com/quotes/john-l-casti/once-the-reality-sets-in-of-a-superhuman-intelligence-being-in/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Accommodations](https://sms4smile.com/quotes/about/accommodations/) [Image](https://sms4smile.com/quotes/i/e66/john-l-casti-24628_accommodations_once-the-reality-sets-in-of-a-superhuman_2463423.png) > [To function effectively, the system scientist must know a considerable amount about the natural world AND about mathematics, without being an expert…](https://sms4smile.com/quotes/john-l-casti/to-function-effectively-the-system-scientist-must-know-a-considerable/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Amount](https://sms4smile.com/quotes/about/amount/) [Image](https://sms4smile.com/quotes/i/703/john-l-casti-24628_amount_to-function-effectively-the-system-scien_3059134.png) > [What distinguishes a mathematical model from, say, a poem, a song, a portrait or any other kind of "model," is that the…](https://sms4smile.com/quotes/john-l-casti/what-distinguishes-a-mathematical-model-from-say-a-poem-a-song-a/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Kind](https://sms4smile.com/quotes/about/kind/) [Image](https://sms4smile.com/quotes/i/1ce/john-l-casti-24628_kind_what-distinguishes-a-mathematical-model_259528.png) > [I don't think the emergence of a superhuman intelligence would be at all catastrophic but much more likely to be beneficial -…](https://sms4smile.com/quotes/john-l-casti/i-don-t-think-the-emergence-of-a-superhuman-intelligence-would-be-at/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Beneficial](https://sms4smile.com/quotes/about/beneficial/) [Image](https://sms4smile.com/quotes/i/251/john-l-casti-24628_beneficial_i-don-t-think-the-emergence-of-a-superhu_751887.png) > [If the group has a negative social mood, believing that tomorrow will be worse than today, the bias goes in the opposite…](https://sms4smile.com/quotes/john-l-casti/if-the-group-has-a-negative-social-mood-believing-that-tomorrow-will/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Believe](https://sms4smile.com/quotes/about/believe/) [Image](https://sms4smile.com/quotes/i/e07/john-l-casti-24628_believe_if-the-group-has-a-negative-social-mood_1889912.png) > [The global financial system consists of firms in the financial services sector - banks, hedge funds, insurance companies and the like -…](https://sms4smile.com/quotes/john-l-casti/the-global-financial-system-consists-of-firms-in-the-financial/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Agency](https://sms4smile.com/quotes/about/agency/) [Image](https://sms4smile.com/quotes/i/bf9/john-l-casti-24628_agency_the-global-financial-system-consists-of_1584205.png) > [If you ask which of the scenarios I think is most dangerous, though, I will give a different answer. In that form…](https://sms4smile.com/quotes/john-l-casti/if-you-ask-which-of-the-scenarios-i-think-is-most-dangerous-though-i/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Answers](https://sms4smile.com/quotes/about/answers/) [Image](https://sms4smile.com/quotes/i/d38/john-l-casti-24628_answers_if-you-ask-which-of-the-scenarios-i-thin_2089631.png) > [From the 1990s onward, the financial sector created a vast array of instruments designed to separate investors from their money, financial derivatives…](https://sms4smile.com/quotes/john-l-casti/from-the-1990s-onward-the-financial-sector-created-a-vast-array-of/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Complexity](https://sms4smile.com/quotes/about/complexity/) [Image](https://sms4smile.com/quotes/i/c46/john-l-casti-24628_complexity_from-the-1990s-onward-the-financial-sect_6682.png) > [Resilience, timing, adaptation - these are the three pillars upon which the emergent properties of interacting systems rest. When the systems are…](https://sms4smile.com/quotes/john-l-casti/resilience-timing-adaptation-these-are-the-three-pillars-upon-which/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Adaptation](https://sms4smile.com/quotes/about/adaptation/) [Image](https://sms4smile.com/quotes/i/e37/john-l-casti-24628_adaptation_resilience-timing-adaptation-these-are-t_472503.png) > [A good analogy is stretching a rubber band. You can stretch and stretch and even feel the tension increase in the muscles…](https://sms4smile.com/quotes/john-l-casti/a-good-analogy-is-stretching-a-rubber-band-you-can-stretch-and/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Analogies](https://sms4smile.com/quotes/about/analogies/) [Image](https://sms4smile.com/quotes/i/753/john-l-casti-24628_analogies_a-good-analogy-is-stretching-a-rubber-ba_1926205.png) > [We see an ever-increasing move toward inter and trans- disciplinary attacks upon problems in the real world ... The system scientist has…](https://sms4smile.com/quotes/john-l-casti/we-see-an-ever-increasing-move-toward-inter-and-trans-disciplinary/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Firsts](https://sms4smile.com/quotes/about/firsts/) [Image](https://sms4smile.com/quotes/i/a19/john-l-casti-24628_firsts_we-see-an-ever-increasing-move-toward-in_110525.png) > [My own guess is that quite quickly the machine intelligence will start dreaming machine dreams and thinking machine thoughts, both of which…](https://sms4smile.com/quotes/john-l-casti/my-own-guess-is-that-quite-quickly-the-machine-intelligence-will/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Computers](https://sms4smile.com/quotes/about/computers/) [Image](https://sms4smile.com/quotes/i/16c/john-l-casti-24628_computers_my-own-guess-is-that-quite-quickly-the-m_414082.jpg) > [System theorists know that it's easy to couple simple-to-understand systems into a "super system" that's capable of displaying behavioral modes that cannot…](https://sms4smile.com/quotes/john-l-casti/system-theorists-know-that-it-s-easy-to-couple-simple-to-understand/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Capable](https://sms4smile.com/quotes/about/capable/) [Image](https://sms4smile.com/quotes/i/05e/john-l-casti-24628_capable_system-theorists-know-that-it-s-easy-to_2501157.png) > [When the next big problem comes online, be it the Euro crisis, nuclear proliferation, an overstretched Internet, a killer flu, or any…](https://sms4smile.com/quotes/john-l-casti/when-the-next-big-problem-comes-online-be-it-the-euro-crisis-nuclear/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Big problem](https://sms4smile.com/quotes/about/big-problem/) [Image](https://sms4smile.com/quotes/i/3b9/john-l-casti-24628_big-problem_when-the-next-big-problem-comes-online-b_149702.png) > [At some point, the world is going to have to bite the bullet and accept a huge downsizing in its way of…](https://sms4smile.com/quotes/john-l-casti/at-some-point-the-world-is-going-to-have-to-bite-the-bullet-and/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Accepting](https://sms4smile.com/quotes/about/accepting/) [Image](https://sms4smile.com/quotes/i/94f/john-l-casti-24628_accepting_at-some-point-the-world-is-going-to-have_2595776.png) > [The process of globalization has now interconnected almost everything ranging from financial markets to transport networks to communication systems in a huge…](https://sms4smile.com/quotes/john-l-casti/the-process-of-globalization-has-now-interconnected-almost-everything/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Communication](https://sms4smile.com/quotes/about/communication/) [Image](https://sms4smile.com/quotes/i/3b2/john-l-casti-24628_communication_the-process-of-globalization-has-now-int_1359963.png) > [In fact, the very nature of an X-event is that it is both rare and surprising. So I would not say that…](https://sms4smile.com/quotes/john-l-casti/in-fact-the-very-nature-of-an-x-event-is-that-it-is-both-rare-and/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Events](https://sms4smile.com/quotes/about/events/) [Image](https://sms4smile.com/quotes/i/c3b/john-l-casti-24628_events_in-fact-the-very-nature-of-an-x-event-is_3155774.png) > [Trying to solve the problem by creating more debt is analogous to trying to stop being an alcoholic by going on a…](https://sms4smile.com/quotes/john-l-casti/trying-to-solve-the-problem-by-creating-more-debt-is-analogous-to/) [John L. Casti](https://sms4smile.com/quotes/author/john-l-casti/) [Alcoholics](https://sms4smile.com/quotes/about/alcoholics/) [Image](https://sms4smile.com/quotes/i/246/john-l-casti-24628_alcoholics_trying-to-solve-the-problem-by-creating_1915705.png) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "ItemList", "@id": "https://sms4smile.com/quotes/author/john-l-casti/#itemlist", "name": "John L. Casti Quotes", "numberOfItems": 24, "itemListElement": [ { "@type": "ListItem", "position": 1, "item": { "@type": "Quotation", "text": "The unfolding time for the end of globalization or a worldwide deflation is much longer, certainly measured in years, if not decades.", "creator": { "@type": "Person", "name": "John L. 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Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 8, "item": { "@type": "Quotation", "text": "To function effectively, the system scientist must know a considerable amount about the natural world AND about mathematics, without being an expert in either field. This is clearly a prescription for career disaster in today's world of ultra-high specialization.", "creator": { "@type": "Person", "name": "John L. Casti" }, "url": "https://sms4smile.com/quotes/john-l-casti/to-function-effectively-the-system-scientist-must-know-a-considerable/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/703/john-l-casti-24628_amount_to-function-effectively-the-system-scien_3059134.png", "contentUrl": "https://sms4smile.com/quotes/i/703/john-l-casti-24628_amount_to-function-effectively-the-system-scien_3059134.png", "url": "https://sms4smile.com/quotes/i/703/john-l-casti-24628_amount_to-function-effectively-the-system-scien_3059134.png", "width": 1080, "height": 1080, "caption": "“To function effectively, the system scientist must know a considerable amount about the natural world AND…” — John L. Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 9, "item": { "@type": "Quotation", "text": "What distinguishes a mathematical model from, say, a poem, a song, a portrait or any other kind of \"model,\" is that the mathematical model is an image or picture of reality painted with logical symbols instead of with words, sounds or watercolors.", "creator": { "@type": "Person", "name": "John L. 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Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 10, "item": { "@type": "Quotation", "text": "I don't think the emergence of a superhuman intelligence would be at all catastrophic but much more likely to be beneficial - just as long as we don't start trying to interfere with it!", "creator": { "@type": "Person", "name": "John L. 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In that form of the question, I regard a nuclear attack, terrorist-generated or otherwise, as the most threatening combination of likelihood and long-term damage to modern life today.", "creator": { "@type": "Person", "name": "John L. Casti" }, "url": "https://sms4smile.com/quotes/john-l-casti/if-you-ask-which-of-the-scenarios-i-think-is-most-dangerous-though-i/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/d38/john-l-casti-24628_answers_if-you-ask-which-of-the-scenarios-i-thin_2089631.png", "contentUrl": "https://sms4smile.com/quotes/i/d38/john-l-casti-24628_answers_if-you-ask-which-of-the-scenarios-i-thin_2089631.png", "url": "https://sms4smile.com/quotes/i/d38/john-l-casti-24628_answers_if-you-ask-which-of-the-scenarios-i-thin_2089631.png", "width": 1080, "height": 1080, "caption": "“If you ask which of the scenarios I think is most dangerous, though, I will give a different answer. In that…” — John L. 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You can stretch and stretch and even feel the tension increase in the muscles in your hands and arms as the gap from one end of the band to the other widens. But at some point you reach the limits of elasticity of the band and it snaps. The same thing happens with human systems.", "creator": { "@type": "Person", "name": "John L. Casti" }, "url": "https://sms4smile.com/quotes/john-l-casti/a-good-analogy-is-stretching-a-rubber-band-you-can-stretch-and/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/753/john-l-casti-24628_analogies_a-good-analogy-is-stretching-a-rubber-ba_1926205.png", "contentUrl": "https://sms4smile.com/quotes/i/753/john-l-casti-24628_analogies_a-good-analogy-is-stretching-a-rubber-ba_1926205.png", "url": "https://sms4smile.com/quotes/i/753/john-l-casti-24628_analogies_a-good-analogy-is-stretching-a-rubber-ba_1926205.png", "width": 1080, "height": 1080, "caption": "“A good analogy is stretching a rubber band. 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Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 19, "item": { "@type": "Quotation", "text": "System theorists know that it's easy to couple simple-to-understand systems into a \"super system\" that's capable of displaying behavioral modes that cannot be seen in any of its constituent parts. This is the process called \"emergence.\"", "creator": { "@type": "Person", "name": "John L. 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Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 20, "item": { "@type": "Quotation", "text": "When the next big problem comes online, be it the Euro crisis, nuclear proliferation, an overstretched Internet, a killer flu, or any of the other possibilities I consider in X-Events, we will suffer a complexity overload.", "creator": { "@type": "Person", "name": "John L. 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Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 21, "item": { "@type": "Quotation", "text": "At some point, the world is going to have to bite the bullet and accept a huge downsizing in its way of life to bring the assets-to-debt ratio back in touch with reality.", "creator": { "@type": "Person", "name": "John L. Casti" }, "url": "https://sms4smile.com/quotes/john-l-casti/at-some-point-the-world-is-going-to-have-to-bite-the-bullet-and/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/94f/john-l-casti-24628_accepting_at-some-point-the-world-is-going-to-have_2595776.png", "contentUrl": "https://sms4smile.com/quotes/i/94f/john-l-casti-24628_accepting_at-some-point-the-world-is-going-to-have_2595776.png", "url": "https://sms4smile.com/quotes/i/94f/john-l-casti-24628_accepting_at-some-point-the-world-is-going-to-have_2595776.png", "width": 1080, "height": 1080, "caption": "“At some point, the world is going to have to bite the bullet and accept a huge downsizing in its way of life…” — John L. Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 22, "item": { "@type": "Quotation", "text": "The process of globalization has now interconnected almost everything ranging from financial markets to transport networks to communication systems in a huge system that no one really understands.", "creator": { "@type": "Person", "name": "John L. Casti" }, "url": "https://sms4smile.com/quotes/john-l-casti/the-process-of-globalization-has-now-interconnected-almost-everything/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/3b2/john-l-casti-24628_communication_the-process-of-globalization-has-now-int_1359963.png", "contentUrl": "https://sms4smile.com/quotes/i/3b2/john-l-casti-24628_communication_the-process-of-globalization-has-now-int_1359963.png", "url": "https://sms4smile.com/quotes/i/3b2/john-l-casti-24628_communication_the-process-of-globalization-has-now-int_1359963.png", "width": 1080, "height": 1080, "caption": "“The process of globalization has now interconnected almost everything ranging from financial markets to…” — John L. Casti", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 23, "item": { "@type": "Quotation", "text": "In fact, the very nature of an X-event is that it is both rare and surprising. So I would not say that any specific X-event is likely. What I would say, though, is that some X-event is not only plausible, but very likely in a time scale of a few years.", "creator": { "@type": "Person", "name": "John L. 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