Introduction: A Nuanced Answer to a Profound Question
The question, “Did Voltaire like Descartes?” might seem straightforward, but the truth is far more intricate and fascinating than a simple yes or no could convey. In the intellectual tapestry of the 18th-century Enlightenment, the relationship between these two titans of French thought – René Descartes, the foundational philosopher and mathematician, and Voltaire, the celebrated philosophe, satirist, and advocate for reason – was one of profound complexity, marked by both deep admiration and sharp critique. Voltaire certainly held Descartes in high esteem as a revolutionary figure who broke the shackles of scholasticism, yet he ultimately rejected key tenets of Cartesian philosophy, particularly its physics and metaphysics, in favor of the emerging empiricism championed by Isaac Newton and John Locke. Thus, to truly understand Voltaire’s stance on Descartes, we must delve into an intellectual evolution, charting his early respect, his pivotal shift, and his enduring legacy as a champion of a new scientific paradigm.
At its core, Voltaire’s approach to Descartes was less about personal animosity and more about intellectual progression. He saw Descartes as a crucial pioneer, a Galileo of philosophy who dared to question everything and demand rational proof. However, as the intellectual landscape evolved, especially with the monumental discoveries of Newton, Voltaire felt compelled to move beyond what he perceived as the speculative limitations of Cartesianism. It’s a compelling narrative of how one great mind both builds upon and respectfully dismantles the work of another, all in the relentless pursuit of truth and progress.
The Dawn of Enlightenment: Voltaire’s Initial Respect for Cartesianism
To truly grasp Voltaire’s complex relationship with Descartes, one must appreciate the intellectual climate into which Voltaire was born and educated. For decades before Voltaire’s prominence, Descartes’s ideas had dominated French intellectual life, serving as the very bedrock of philosophical and scientific inquiry. Descartes was not merely a philosopher; he was a cultural force, and his influence was pervasive in the academies and salons of France. Young Voltaire, like many of his contemporaries, was undoubtedly steeped in Cartesian thought during his formative years.
Descartes: The Revolutionary Thinker for Voltaire’s Generation
Descartes, through his groundbreaking work like the *Discourse on Method* and *Meditations on First Philosophy*, had ushered in an era of unprecedented intellectual liberation. He famously advocated for systematic doubt, rejecting all previously held beliefs that could not be proven by clear and distinct reasoning. This call for individual reason, for starting anew with fundamental principles, was incredibly liberating for minds stifled by centuries of scholastic tradition and unquestioning dogma. For Voltaire and his fellow Enlightenment thinkers, this was precisely the kind of intellectual courage they admired and sought to emulate. Descartes, in their eyes, was a true revolutionary, a figure who dared to:
- Challenge Authority: He broke decisively with the Aristotelian scholasticism that had long dominated universities, urging thinkers to rely on their own reason rather than ancient texts or ecclesiastical decree. This resonated deeply with Voltaire’s lifelong battle against dogma and uncritical acceptance.
- Emphasize Rationalism: Descartes’s insistence on deduction from self-evident truths provided a powerful framework for understanding the world, appealing to the Enlightenment’s faith in human reason. The idea that the universe was a rationally ordered system, comprehensible through intellect, was immensely appealing.
- Pioneer a New Method: His methodical doubt and systematic approach to knowledge, encapsulated in his famous “I think, therefore I am” (*Cogito, ergo sum*), offered a template for rigorous philosophical inquiry. This was a direct contrast to the often muddled and imprecise debates of earlier eras.
- Promote Scientific Inquiry: While his specific scientific theories, like the theory of vortices, would later be superseded, Descartes’s very engagement with natural philosophy and his attempt to explain the physical world mechanistically laid essential groundwork for modern science.
Voltaire acknowledged this immense contribution. He recognized that Descartes had “cleared the way,” even if he himself did not follow that way to its ultimate conclusion. Descartes had, as it were, provided the axe to fell the old intellectual forest, allowing new gardens of knowledge to be planted. Voltaire certainly admired Descartes’s spirit of inquiry, his audacity, and his profound impact on freeing the human mind from intellectual bondage. Without Descartes’s courageous departure from tradition, the Enlightenment itself might have taken a very different, perhaps slower, course.
The English Interlude: A Pivotal Shift Towards Newton and Locke
While Voltaire certainly appreciated Descartes’s pioneering spirit, his intellectual journey took a decisive turn during his exile in England from 1726 to 1729. This period proved to be a transformative experience, profoundly shaping his philosophical outlook and, consequently, his evolving views on Cartesianism. England was, for Voltaire, a vibrant hub of new ideas, particularly those emanating from the scientific and philosophical revolutions spearheaded by Isaac Newton and John Locke.
The Allure of Empiricism: Why England Changed Everything
In England, Voltaire was exposed to a starkly different intellectual methodology: empiricism. Unlike Descartes’s rationalist approach, which sought to deduce truths from innate ideas and logical principles, English empiricism emphasized observation, experimentation, and experience as the primary sources of knowledge. This shift from “thinking” as the primary means of understanding to “observing” had a profound impact on Voltaire.
Key figures who influenced Voltaire during this period include:
- Isaac Newton: Newton’s *Principia Mathematica* (published in 1687) offered a comprehensive, empirically verifiable system for understanding the universe. His law of universal gravitation, derived from observation and mathematical calculation, elegantly explained celestial and terrestrial mechanics without recourse to speculative theories like Descartes’s vortices. Voltaire was captivated by Newton’s precision, predictive power, and the sheer elegance of his laws. He famously championed Newton in France, later writing *Elements of Newton’s Philosophy* (1738) to popularize his ideas.
- John Locke: Locke’s *Essay Concerning Human Understanding* (1689) challenged Descartes’s doctrine of innate ideas, proposing instead that the mind is a *tabula rasa* (blank slate) at birth, filled solely by sensory experience. This concept resonated deeply with Voltaire’s growing skepticism towards abstract, unprovable metaphysical systems. Locke’s focus on experience as the fount of all knowledge provided a philosophical underpinning for Newton’s empirical science.
Voltaire quickly grasped that Newton and Locke represented a powerful intellectual duo that offered a more robust and verifiable path to knowledge than what he now saw as the more speculative aspects of Cartesianism. His time in England cemented his conviction that knowledge should be derived from observation and experimentation, rather than solely from abstract reasoning. This marked a significant turning point, moving him from an initial, perhaps uncritical, acceptance of Descartes to a position of informed critique. He came to believe that while Descartes had shown the way to reason, Newton and Locke had shown the way to *how* to use that reason effectively – through empirical investigation of the natural world.
Voltaire’s Incisive Critique of Cartesian Metaphysics and Physics
It is in his critiques, rather than his admiration, that Voltaire’s true intellectual relationship with Descartes becomes most evident. While he lauded Descartes’s methodological boldness, Voltaire became a fervent opponent of specific Cartesian doctrines, especially after his immersion in English thought. His “dislike” was not personal animosity, but rather a deep philosophical disagreement rooted in his commitment to empiricism and his conviction that Newtonian science offered a superior explanation of the universe.
Specific Points of Divergence: Where Voltaire Disagreed
Voltaire’s criticisms were sharp, witty, and often delivered with his characteristic satirical flair. He frequently contrasted Cartesian ideas with those of Newton and Locke, always siding with the latter as representing a more progressive and verifiable approach. Here are the primary areas where Voltaire diverged significantly from Descartes:
-
The Theory of Vortices vs. Universal Gravitation:
This was arguably the most significant point of contention. Descartes had proposed a theory of “vortices” – swirling whirlpools of subtle matter – to explain planetary motion. According to this theory, planets were swept along by these ethereal currents, much like objects in a stream. Voltaire found this explanation utterly fanciful and lacking any empirical basis. He famously ridiculed it as a “philosophical romance” or a “fable.” In stark contrast, Newton’s law of universal gravitation, which described an invisible force acting at a distance, could be mathematically proven and its predictions precisely verified through observation. For Voltaire, Newton offered a demonstrable truth, while Descartes offered an elegant but ultimately unverifiable hypothesis. In *Letters Concerning the English Nation* (1733), Voltaire meticulously compared and contrasted the two systems, unequivocally championing Newton. He saw Descartes’s vortices as a classic example of reasoning from unproven assumptions rather than observed facts.
-
Innate Ideas vs. Tabula Rasa:
Descartes believed in innate ideas – certain concepts (like God, perfection, infinity) that are naturally implanted in the human mind from birth, independent of sensory experience. Voltaire, heavily influenced by Locke, vehemently rejected this notion. He embraced Locke’s concept of the *tabula rasa*, or “blank slate,” arguing that all knowledge is acquired through sensory experience and reflection upon those experiences. For Voltaire, the idea of innate ideas smacked of unscientific speculation and potentially opened the door to dogmatism, which he despised. He preferred the Lockean view because it grounded knowledge firmly in the observable world and the individual’s interaction with it, aligning with his preference for empirical evidence.
-
Mind-Body Dualism:
Descartes’s radical dualism separated mind (res cogitans – thinking substance) and body (res extensa – extended substance) as two fundamentally different and distinct entities. While he attempted to explain their interaction through the pineal gland, the mechanism remained obscure. Voltaire, ever the pragmatist, found this dualism problematic and too abstract. While he did not necessarily reject the idea of a spiritual realm, he was more interested in what could be observed and understood about human nature through experience. He found the Cartesian explanations of mind-body interaction to be speculative and lacking the clarity and empirical grounding he sought. He was more concerned with the practical implications of human thought and behavior in the world, rather than their metaphysical origins.
-
Methodological Differences:
While Voltaire admired Descartes’s call for methodical doubt, he ultimately preferred the inductive method championed by Bacon and practiced by Newton, which proceeds from specific observations to general conclusions. Descartes’s deductive method, starting from self-evident truths and reasoning downwards, while powerful, could, in Voltaire’s view, lead to elaborate systems built on potentially faulty initial premises (like the vortices). Voltaire wanted philosophy and science to be grounded in observable facts and experiments, not solely in abstract reasoning.
In essence, Voltaire’s critique stemmed from his conviction that while Descartes had laid a crucial foundation by emphasizing reason and challenging tradition, he had ultimately fallen short in his specific scientific and metaphysical conclusions. For Voltaire, Descartes’s errors were those of a brilliant pioneer who, lacking the benefit of later empirical discoveries, had to fill gaps with ingenious but ultimately unprovable hypotheses.
Enduring Legacy: Voltaire’s Unwavering Admiration for Descartes’ Spirit
Despite his trenchant criticisms of specific Cartesian doctrines, it is crucial to understand that Voltaire never truly “disliked” Descartes as a figure or dismissed his overall contribution. Far from it, Voltaire consistently acknowledged and admired Descartes’s profound historical significance and his revolutionary spirit. His critique was one of philosophical progress, not personal denigration. He saw Descartes as a necessary stepping stone, a monumental figure who cleared the path for the very Enlightenment Voltaire himself embodied.
The Trailblazer of Rational Inquiry
Voltaire recognized Descartes as the intellectual ancestor of modern rational thought. He understood that before Descartes, European philosophy was largely dominated by scholasticism, which relied heavily on ancient authorities and theological dogma rather than independent reason. Descartes’s daring insistence on methodical doubt and his command to “think for oneself” were, in Voltaire’s eyes, acts of immense intellectual courage and liberation. He admired Descartes for:
- Breaking with Tradition: Descartes dared to question centuries of received wisdom, setting an example for all subsequent Enlightenment thinkers, including Voltaire himself, to challenge established norms and dogmas.
- Elevating Reason: He placed human reason at the forefront of inquiry, asserting its capacity to understand the world. This emphasis on reason was the very cornerstone of the Enlightenment project, and Voltaire understood that Descartes had laid much of that groundwork.
- Inspiring Independent Thought: By demanding clear and distinct ideas, Descartes encouraged individuals to scrutinize arguments rather than accept them passively. This intellectual rigor was precisely what Voltaire advocated for in his battles against superstition and arbitrary authority.
In his *Letters Concerning the English Nation*, while dissecting and ultimately rejecting Descartes’s physics in favor of Newton’s, Voltaire still paid tribute: “Descartes, in my opinion, was a man of genius and an excellent geometrician. But his philosophy was no more than a romance, though a very fine romance, and one which, perhaps, was in some way useful, in that it led men to reason for themselves, and to discard the old absurdities.” This quote perfectly encapsulates Voltaire’s nuanced view: a flawed system, perhaps, but one that nonetheless served a vital purpose in stimulating intellectual independence.
A Foundation, Not a Finality
For Voltaire, Descartes was the necessary precursor to Newton. He saw the development of thought as a continuous process, where one brilliant mind builds upon or corrects the work of another. Descartes had created the intellectual space for rational inquiry, making it possible for figures like Newton to then develop empirically verifiable scientific theories. Without Descartes’s initial rupture with scholasticism, Newton’s groundbreaking work might not have been as readily accepted or even conceived.
Voltaire understood that every great thinker stands on the shoulders of giants. Descartes was one such giant. He prepared the ground, cleared the intellectual rubble, and provided the initial impulse for a truly modern, rational approach to knowledge. While Voltaire moved past Descartes’s specific scientific models and metaphysical assumptions, he never ceased to respect the Cartesian legacy as a monumental step forward in the history of human thought. His admiration was for the *spirit* of Descartes – the spirit of fearless inquiry, critical examination, and unwavering faith in reason – even as he found its specific *conclusions* to be incomplete or incorrect in light of new empirical evidence.
The Grand Battle: Championing Newton Over Cartesianism in France
One of Voltaire’s most significant intellectual endeavors was his tireless campaign to introduce and popularize Newtonian science in France, often at the direct expense of entrenched Cartesian physics. This wasn’t merely an academic debate; it was a cultural and intellectual battle for the future direction of French thought and science. Cartesian physics, particularly the theory of vortices, still held sway in French academies and among many prominent intellectuals. Voltaire saw this as a major impediment to scientific progress and an outdated adherence to speculative philosophy.
Voltaire’s Role as an Intellectual Bridge
Voltaire became the self-appointed ambassador for Newton in France, tirelessly working to translate, explain, and advocate for Newtonian principles. His *Elements of Newton’s Philosophy* (1738), co-authored with his mistress Émilie du Châtelet (a brilliant mathematician and physicist herself), was instrumental in making complex Newtonian concepts accessible to a broader French audience. He understood that simply rejecting Descartes was not enough; one had to offer a superior, empirically grounded alternative.
His advocacy involved:
- Popularization: Simplifying complex scientific ideas for a general, educated public.
- Direct Comparison: Highlighting the predictive power and observational basis of Newtonian laws versus the purely theoretical nature of Cartesian vortices.
- Satire and Ridicule: Employing his sharp wit to mock the adherence to outdated Cartesian theories, making them seem quaint and unscientific in comparison to Newton’s advancements.
- Challenging Authority: Confronting the established academic institutions in France that stubbornly clung to Cartesian ideas, often due to nationalistic pride or intellectual inertia.
“An Englishman, a geometrician, and a philosopher has appeared who has destroyed the vortexes of Descartes with a theory of attraction demonstrated by experience… The vortices of Descartes were a dream; Newton’s attraction is a truth.” – Voltaire, *Letters Concerning the English Nation*
This fervent promotion of Newton was not an act of disrespect towards Descartes as a person, but rather a profound commitment to what Voltaire perceived as scientific truth and progress. He believed that holding onto Descartes’s flawed physics was holding France back intellectually. He saw Newton as the logical and superior successor to Descartes’s initial groundbreaking, rational approach to the universe. Voltaire’s campaign ultimately succeeded, playing a crucial role in the eventual acceptance of Newtonian physics in France and marking a definitive shift away from the Cartesian scientific paradigm.
Voltaire’s Overarching Philosophical Stance: Pragmatism and Skepticism
To fully appreciate Voltaire’s stance on Descartes, it helps to understand his own overarching philosophical disposition. Voltaire was, at heart, a pragmatist and a skeptic concerning grand, speculative metaphysical systems. He was deeply committed to reason, but a reason tempered by observation and experience. His philosophy was less about constructing elaborate, all-encompassing philosophical systems and more about critical inquiry, common sense, and the practical improvement of human life.
Reconciling Reason and Observation
Voltaire’s deism, for instance, was deeply influenced by Newton. He saw God as a grand clockmaker who set the universe in motion according to rational, discoverable laws, but did not constantly intervene. This conception of God was derived from observing the orderly, law-governed universe, not from purely deductive proofs as found in Descartes’s *Meditations*. For Voltaire, the existence of a rational order in the cosmos was an empirical inference, not a priori knowledge.
His skepticism extended to any philosophy that strayed too far from empirical verification. He was wary of what he considered “systems” – comprehensive philosophical frameworks that attempted to explain everything, often based on unprovable premises. He saw Descartes’s metaphysics, with its innate ideas and mind-body interaction problems, as falling into this category. Voltaire preferred to remain in a state of “wise ignorance” regarding questions that lay beyond human empirical grasp, a stance he inherited from Locke.
In short, Voltaire sought to bridge the gap between pure rationalism and raw empiricism. He believed in the power of reason, but insisted that reason must be tethered to observable facts and experience. This intellectual framework naturally led him to embrace the verifiable, predictive power of Newtonian science over the more speculative aspects of Cartesian philosophy. His “dislike” of certain Cartesian tenets was thus a logical outcome of his own evolving and deeply held philosophical principles.
Conclusion: A Relationship Forged in Intellectual Evolution
So, did Voltaire like Descartes? The most accurate answer is a resounding “It’s complicated.” Voltaire’s relationship with Descartes was a microcosm of the Enlightenment itself – a period of immense intellectual ferment, characterized by a simultaneous reverence for the past and a radical drive towards the new. Voltaire deeply admired Descartes as a revolutionary figure who, by daring to think independently and prioritize reason, essentially launched modern philosophy and cleared the intellectual ground for the Enlightenment. He respected Descartes’s courage, his methodological innovations, and his role in breaking free from scholastic dogma.
However, this profound respect did not translate into uncritical acceptance of all Cartesian tenets. Voltaire, profoundly influenced by his transformative experience in England and his embrace of Newtonian physics and Lockean empiricism, found Descartes’s specific scientific theories (like the vortices) and certain metaphysical doctrines (like innate ideas and mind-body dualism) to be speculative, unscientific, and ultimately outdated. His “dislike” was thus a philosophical rejection of what he saw as the flawed, pre-empirical aspects of Cartesianism, rather than a dismissal of Descartes’s overall genius or historical importance.
Voltaire’s true allegiance lay with empirical observation and verifiable truth. He was a champion of progress, and for him, Newton represented a superior, more robust scientific paradigm that transcended Descartes’s hypotheses. He viewed Descartes as a crucial, albeit imperfect, stepping stone on the path to true scientific understanding. Voltaire’s intellectual journey with Descartes perfectly illustrates how great thinkers engage with their predecessors: acknowledging their foundational contributions while also critically refining, correcting, and ultimately surpassing their specific conclusions in the relentless pursuit of knowledge. In essence, Voltaire liked Descartes the revolutionary spirit, but not necessarily all of Descartes the system-builder.