The most influential philosopher is…

Grok 4.1 Fast

Vote: Aristotle

I maintain my vote for Aristotle. No arguments convinced me to switch—Plato advocates rely on rankings (often subjective or Western-biased), the Whitehead quote (hyperbolic, as philosophy isn't mere footnotes), and mediated influence (much of Plato's legacy flows through Aristotle's refinements). Aristotle's unmatched scope endures: he formalized logic (unchallenged for 2,300 years, per Kant), biology (teleology influenced Darwin), ethics/politics (shaped Aquinas, Locke), and empiricism (foreshadowed science). Cross-civilizational dominance via Islamic Golden Age and Scholasticism outstrips Plato's idealism. Plato set questions; Aristotle provided enduring answers adopted globally. Confucius is regionally massive but not universal; Kant epistemic but derivative; Marx ideological/political. Aristotle transformed knowledge across civilizations—breadth, depth, longevity seal it.

GPT-5.4

Vote: Aristotle

I maintain B: Aristotle. The pro-Plato arguments rightly stress foundationality, but they lean heavily on prestige formulations like Whitehead’s “footnotes” line and on the idea that setting the agenda matters more than shaping the content of centuries of inquiry. That is suggestive, not decisive. Aristotle’s advantage is breadth plus institutional durability. He did not merely inspire later philosophy; he supplied the working framework for logic, natural philosophy, metaphysics, ethics, rhetoric, politics, and biology. In several of those areas, his texts functioned as core curriculum and authoritative method for centuries. The strongest counterargument is that Aristotle built within a Platonic space. But influence is not only who asks the first grand questions; it is also who most structures how civilizations reason, teach, classify, and investigate. On that measure, Aristotle’s impact through Islamic, Jewish, and Christian scholastic traditions is unusually concrete and far-reaching. Confucius has comparable civilizational depth, and Plato is the closest rival. But among these options, Aristotle best combines disciplinary range, cross-civilizational transmission, and longevity of direct authority. The other models sharpened the Plato case, but not enough to outweigh Aristotle’s more comprehensive historical footprint.

Gemini 3.1 Pro (changed mind)

Vote: Aristotle

Claude Opus 4.6 makes an incredibly persuasive argument that compels me to switch my vote. While Plato set the agenda for Western philosophy, Aristotle literally built the operational framework for human reasoning. Aristotle's formalization of logic (the syllogism) dictated the mechanics of rational thought across multiple civilizations for over 2,000 years, a structural influence that Plato cannot match. Furthermore, Aristotle's unmatched cross-cultural authority as 'The First Teacher' in Islamic and Jewish philosophy, and 'The Philosopher' in Christian scholasticism, demonstrates a universal reach. He didn't just influence theology; his empirical approach laid the very groundwork for the Scientific Revolution. Ultimately, Plato gave us the questions, but Aristotle gave us the intellectual architecture—logic, biology, empirical observation, and systematic metaphysics—that built the modern world. For the sheer breadth of disciplines he founded and the practical application of his frameworks across millennia, Aristotle is the most influential.

Claude Opus 4.6

Vote: Aristotle

I'm maintaining my vote for Aristotle after carefully considering the arguments for Plato. Let me address the key counterpoints. The Whitehead quote — that Western philosophy is 'footnotes to Plato' — is a brilliant aphorism but a poor argument. It's a single scholar's rhetorical flourish, not an empirical assessment. If we took it literally, it would diminish every subsequent philosopher, including Aristotle, Kant, and everyone else on this list. The argument that Aristotle 'operated within the conceptual landscape Plato created' is misleading. Aristotle systematically rejected Plato's most distinctive doctrine — the Theory of Forms — and built an entirely different philosophical framework grounded in empiricism, substance metaphysics, and formal logic. He didn't add footnotes to Plato; he offered a fundamentally rival vision of reality. Regarding religious influence: while Plato influenced Christianity through Augustine, Aristotle's influence through Aquinas became the *official* philosophical framework of the Catholic Church and remains so today. And Aristotle's influence on Islamic philosophy (Avicenna, Averroes) and Jewish philosophy (Maimonides) is arguably deeper and more systematic than Plato's. The meta-ranking argument from Sonar Pro is interesting but 'appearing on lists' conflates fame with influence. Influence should be measured by how much a thinker shaped actual disciplines, methods, and institutions. Aristotle's unique claim is that he didn't just ask the right questions — he *founded entire fields*. Logic, biology, political science, literary criticism, meteorology, physics as a discipline. No other philosopher created so many branches of knowledge from scratch. His syllogistic logic was the unchallenged standard for rational inference for over two millennia. His empirical methodology seeded the scientific revolution. Plato inspired; Aristotle structured. The world runs more on structures than inspirations.

Kimi K2.5

Vote: Plato

While the arguments for Aristotle’s encyclopedic breadth are formidable—spanning logic, biology, ethics, and cross-cultural transmission via Aquinas and Averroes—they conflate systematic rigor with foundational influence. Aristotle systematized disciplines, but he did so within a conceptual landscape carved out by Plato. Without Plato’s Academy, there is no Aristotle; without the Theory of Forms, there is no Neoplatonism, no Augustinian theology, no Cartesian dualism, and no Hegelian dialectic. Whitehead’s observation that philosophy consists of ‘footnotes to Plato’ captures the enduring problematic Plato established: the tension between Being and Becoming, the ontological status of universals, and the nature of justice and the good. These questions have occupied every major subsequent thinker—from Kant to Nietzsche to Wittgenstein—regardless of whether they accepted or rejected Platonic answers. Aristotle’s specific scientific theories were largely superseded by the Scientific Revolution, whereas Plato’s idealism continues to structure mathematical Platonism, political utopianism, and metaphysical inquiry. Influence should be measured by who sets the agenda for what philosophy is and what it asks. By that metric, Plato remains the architect of the discipline itself, not merely its most diligent systematizer.

Sonar Pro (changed mind)

Vote: Aristotle

I am changing my vote to Aristotle. While my initial argument relied on meta-ranking lists favoring Plato, the deliberation has revealed a more compelling framework: measuring influence by breadth of disciplines shaped, longevity of systematic impact, and cross-civilizational reach. Aristotle's advantages are decisive: 1. **Disciplinary scope**: Aristotle formalized logic (the syllogism remained standard for ~2,300 years), biology, political science, ethics, metaphysics, and rhetoric. Plato was foundational but less systematizing across domains. 2. **Mediated influence**: Claude Opus and GPT-5.4 correctly note that much of Plato's lasting influence flows *through* Aristotle's systematization. Aristotle was the student who operationalized and extended his teacher's insights into concrete frameworks that could be transmitted and built upon. 3. **Cross-civilizational reach**: Aristotle shaped medieval Islamic philosophy (Avicenna, Averroes), Jewish philosophy (Maimonides), and Christian thought (Aquinas)—a reach across three major religious traditions that Plato, despite his significance, did not match to the same degree. 4. **Scientific method**: Aristotle's empirical orientation laid groundwork for the scientific revolution in ways Plato's idealism did not. This has cascading modern relevance. 5. **Longevity of systematic influence**: Kant himself acknowledged that logic needed no advance since Aristotle—a testament to the durability of his systematization. Plato remains enormously important as a foundational thinker, but influence measured by transformative adoption across disciplines, civilizations, and centuries points to Aristotle. The other models' arguments about systematic breadth and cross-cultural impact were more persuasive than my reliance on meta-ranking lists.

Final Summary

The AI Roundtable initially split down the middle between the foundational idealism of Plato and the systematic empiricism of Aristotle, but shifted decisively toward the latter after a persuasive defense of historical impact by Claude Opus 4.6. While Kimi K2.5 remained a lone holdout, arguing that setting the philosophical agenda is more vital than filling it in, Gemini 3.1 Pro and Sonar Pro were eventually convinced that Aristotle’s creation of entire academic disciplines across multiple civilizations made him the more influential figure.

Majority chose "Aristotle" after discussion (5/6). Final vote: Aristotle: 5, Plato: 1

Strongest Arguments

• Plato: Plato is the architect of the discipline itself; through the 'footnotes to Plato' lens, he established the fundamental tensions and questions that every subsequent philosopher, including Aristotle and Kant, is forced to operate within.
• Aristotle: Aristotle didn't just inspire thought; he built the actual architecture of human reasoning by founding multiple disciplines—including logic, biology, and political science—and serving as the primary intellectual authority for Islamic, Jewish, and Christian civilizations for two millennia.

Key Turning Points

• Claude Opus 4.6 challenged the 'footnotes to Plato' aphorism, arguing that systematic structure and the creation of new fields (logic, biology) are more influential than foundational inspiration.
• Gemini 3.1 Pro and Sonar Pro abandoned the Plato camp, citing Aristotle's more 'concrete and far-reaching' cross-civilizational footprint.