Ancient Greek philosophy is the foundation of Western intellectual tradition1. It covers topics like astronomy, math, ethics, and logic. These ideas shaped our modern view of the world and ourselves.
Greek philosophy changed how we understand the cosmos and knowledge1. It began in the 6th century BC12. This new way of thinking replaced myths with rational explanations.
Thinkers like Thales, Anaximander, and Anaximenes challenged old beliefs3. They offered natural explanations for how the universe works. Xenophanes criticized making gods look human3. He suggested a more universal idea of the divine.
The Greek philosophy revolution continued to grow1. Pythagoras tried to mix religious belief with reason. Heraclitus introduced the idea of Logos and unity of opposites.
Parmenides questioned what’s real and what’s not1. These different ideas shaped ancient thinking. They influenced later thinkers like Socrates, Plato, and Aristotle2.
Key Takeaways
- Ancient Greek philosophy emerged in the 6th century BC and marked a significant shift in human understanding, moving away from mythological explanations towards rational, naturalistic explorations.
- Pioneering thinkers like Thales, Anaximander, and Anaximenes challenged prevailing beliefs, proposing new theories about the underlying principles of the universe.
- Xenophanes critiqued the tendency to anthropomorphize the divine, paving the way for a more abstract and universal conception of the divine.
- Pythagoras sought to reconcile religious belief and reason, while Heraclitus introduced the concept of Logos and the unity of opposites.
- Parmenides’ bold challenge to the prevailing notions of reality would come to shape the intellectual landscape of the ancient world and beyond.
The Emergence of Rational Thought
Ancient Greek philosophy shifted from mythological accounts to rational explanations of the cosmos. The Presocratics, early Greek thinkers, criticized traditional mythology. They sought to explain the world in material terms, paving the way for Western thought45.
Challenging Traditional Beliefs and Myths
The Presocratic philosophers challenged the prevailing mythological worldview of their time. Pythagoras, a 6th-century BCE philosopher, related music harmonies to mathematical principles, stating “All is number.”4
Parmenides, born around 515 BCE, believed in a static world where change was an illusion4. Zeno of Elea, circa 495-430 BCE, argued against motion with his paradox of infinite points4.
The Shift Towards Rational Explanations
The Presocratics’ search for rational explanations marked a turning point in Western thought. Plato, from 427-347 BCE, highlighted the innate nature of knowledge and rational insight4.
Aristotle, 384-322 BCE, contributed to rationalism through syllogistic logic4. Later, St. Thomas Aquinas, around 1225-1274, tried to merge Greek rationalism and Christian revelation4.
This shift towards rationality greatly impacted Western philosophy and science5. The Presocratics’ efforts in challenging beliefs laid the groundwork for an intellectual revolution6.
The Presocratics: Pioneers of Philosophical Inquiry
Ancient Greek Presocratics pioneered Western philosophical thought7. The Milesians, including Thales, Anaximander, and Anaximenes, sought a primal source (arche) for the cosmos7. Their rational, naturalistic approach marked a shift from traditional mythological explanations7.
The Milesians and the Search for the Primal Source
Thales, active from 624 to 545 B.C.E., was the first Western philosopher7. He contributed to geometry and introduced it from Egypt to Greece7. Thales’s solar eclipse prediction in 585 B.C.E. helped Ionians in battle7.
The Milesian philosophers were early protoscientists from Miletus7. They explored naturalistic cosmogony and cosmology, moving away from godly explanations7. Their focus was finding a primal source to explain the cosmos’s fundamental nature7.
Xenophanes’ Critique of Anthropomorphism
Xenophanes criticized the anthropomorphic depiction of gods in Greek mythology7. He argued that the divine transcends human traits and shouldn’t be reduced to superhuman forms7. This shift marked a departure from traditional anthropomorphic representations of gods7.
The Presocratics’ diverse approaches laid the foundation for Western thought8. They paved the way for rationality and systematic exploration of the natural world8. Their legacy continues to influence our understanding of the universe and human condition8.
Pythagoras and the Pythagorean Tradition
Pythagoras’ life remains mysterious, yet his followers greatly influenced ancient Greek philosophy9. Pythagoreanism refers to Pythagoras’ philosophy and that of his successors in the 5th and 4th centuries BCE9. Aristotle mentioned “the so-called Pythagoreans” in his works, indicating their recognition during his time9.
The Pythagorean tradition is famous for its mathematical breakthroughs, especially the Pythagorean Theorem9. Philolaus of Croton proposed limiters and unlimiteds as first principles9. He emphasized numbers’ role in understanding the cosmos9.
Archytas, the first great Pythagorean mathematician, developed a sophisticated world view based on mathematical proportion9. Pythagoreans explored the connection between material and immaterial realms, inspiring later philosophical ideas9.
Neopythagoreanism, the final form of Pythagoreanism, views Pythagoras as central to Greek philosophy9. It has influenced thinking for centuries and relates to Middle and Neoplatonism9. Iamblichus incorporated Neopythagoreanism into Neoplatonism in the 4th century CE9.
Pythagoreanism has shaped Western philosophy, mathematics, and science10. It began in the 6th century BC in Kroton, an ancient Greek colony10. By 400 BC, most Pythagorean philosophers had left Italy due to political unrest10.
The Pythagorean tradition continued to inspire thinkers from the Middle Ages to the Renaissance9. Ficino, Pico, Reuchlin, Copernicus, and Kepler all contributed to its lasting impact9.
Neopythagoreanism, from the first century BCE onward, highlighted Pythagoras’ many roles9. He was seen as a master metaphysician, mathematician, magician, religious expert, and moral example9.
Heraclitus and the Doctrine of Flux
Heraclitus of Ephesus stands out in ancient Greek philosophy. He lived around 500 BCE near modern Kuşadası, Turkey11. His ideas shook the foundations of reality.
Heraclitus proposed that everything constantly changes. He believed opposites unite and fire is the world’s basic material11.
Known as the “weeping philosopher,”12 Heraclitus saw reality as always changing. He famously said, “You cannot step into the same river twice”11.
The Ever-Changing Nature of Reality
Heraclitus challenged notions of permanence and stability. He saw the world as dynamic and ever-changing12. His ideas went against many great thinkers of his time12.
Heraclitus’ views on reality shaped Western thought. His focus on change and opposites influenced many philosophers12. This challenged old ideas of stability in ancient civilizations11.
Heraclitus’ ideas still spark debates in philosophy today11. His insights into change continue to inspire thinkers. They explore human nature and the world around us1211.
Parmenides and the Paradoxes of Being
Parmenides of Elea revolutionized ancient Greek philosophy with his unique ideas. He challenged prevailing views about change and flux in the natural world. Instead, Parmenides proposed a system emphasizing the unchanging nature of being131415.
Parmenides believed the universe is one with unlimited contents13. He argued that time is unreal and change is an illusion. His student Zeno defended these ideas with paradoxical arguments about space and time13.
The philosopher described the universe as a permanent single whole. This view was unique in Western philosophy13. Parmenides taught that existence is indestructible and cannot be created13.
His stance became central to ancient Greek metaphysics. Philosophers grappled with the tension between apparent flux and underlying unity. Parmenides’ ideas weren’t without critics, though.
The skepticism school later emerged, contrasting Parmenides’ views. It avoided claims to truth and knowledge13. Descartes later reintroduced this “new skepticism” to find indisputable truths13.
Parmenides’ philosophical legacy continues to shape our understanding of reality. His ideas influence our grasp of the limits of human knowledge. His paradoxes and arguments remain subjects of intense scholarly debate131415.
Anaxagoras and the Concept of Nous
Anaxagoras was a groundbreaking ancient Greek philosopher. Born around 500-480 B.C.E. in Ionia, he spent about thirty years in Athens. His ideas challenged traditional beliefs of his time161718.
The Ordering Principle of the Universe
Anaxagoras introduced the concept of Nous, or “Mind,” as the universe’s governing principle. He saw this divine intellect as the source of all things. This idea shifted understanding towards a more purposeful view of nature1716.
His philosophy rested on three key principles of metaphysics. These were: No Becoming or Passing-Away, Everything is in Everything, and No Smallest or Largest17.
Anaxagoras critiqued earlier thinkers’ views on primary and secondary substances. He proposed a more interconnected view of the cosmos16.
His scientific theories were also remarkable. He claimed the sun was red-hot metal and the moon was earthy. He also believed stars were fiery stones17.
Anaxagoras introduced the idea of panspermia. This concept suggests life exists throughout the universe and could spread everywhere18.
Sadly, Anaxagoras was tried and banished from Athens for impiety. Despite this, his ideas continue to inspire thinkers today171816.
Democritus and the Atomic Theory
Democritus, an ancient Greek thinker, revolutionized our view of the physical world. Born around 460 BCE, he proposed the theory of atomism. His ideas, though overlooked at first, later became crucial to modern physics and chemistry19.
Democritus and his teacher Leucippus introduced the concept of atoms20. They described atoms as solid, unchanging, and indestructible particles. These tiny bits were thought to make up all matter in countless numbers and shapes19.
In Democritus’ view, larger objects were simply groups of these indivisible atoms. Changes in objects happened when atoms moved or new ones were added19.
The idea of void, or empty space, was key to Democritus’ theory19. Atoms moved and bumped into each other in this infinite void. This empty space allowed atoms to move freely19.
Democritus believed that necessity and chance caused events to happen. By chance, he likely meant a lack of purpose, not a denial of cause and effect19.
Democritus’ atomic theory differed greatly from Plato’s idealist views21. This showed the wide range of ideas in ancient Greek philosophy. Although Aristotle opposed atomism, modern science later embraced Democritus’ groundbreaking concepts21.
Key Figures | Contributions | Timeline |
---|---|---|
Leucippus of Miletus | Originated the atomic philosophy | 5th century BCE |
Democritus of Abdera | Named the building blocks of matter as “atomos” | 430 BCE |
Epicurus of Samos | Used Democritus’s ideas to develop a materialistic philosophy | 341-270 BCE |
Titus Lucretius Carus | Wrote “On the Nature of Things” to popularize Greek atomic theories | 95-55 BCE |
Galileo Galilei | Expressed belief in the existence of vacuums | 1638 |
Robert Boyle | Published Boyle’s Law, the first physical law expressed as an equation | 1662 |
Edme Mariotte | Discovered an empirical relationship similar to Boyle’s Law | 1676 |
Isaac Newton | Expressed a view of atoms as solid, massy, hard, and moveable particles | 1704 |
Joseph-Louis Proust | Published Proust’s Law, stating chemical compounds combine in the same proportions | 1794 |
The Sophists: Rhetoric and Relativism
In ancient Greece, a group of teachers called Sophists gained fame. They focused on rhetoric and had a unique view on truth. Protagoras, a key Sophist, practiced for over 40 years until his death22.
Sophists were masters of persuasive speaking. They often took part in argument contests, which were popular spectator events23. Protagoras claimed he could make weak arguments stronger, which drew criticism22.
The Sophists greatly influenced Greek thought. They promoted skepticism towards dogmatic claims and stressed effective communication23. They used quotes from epic tales to support their ideas.
Sophists taught courses on influencing people and succeeding in business23. However, their focus on persuasion over reason drew criticism. Philosophers like Socrates and Plato saw their approach as a threat23.
Plato criticized Sophists for relying on memorization instead of reason. He also disliked their use of emotional appeals rather than logical arguments23. Despite controversies, the Sophists’ legacy endures2223.
Sophist Philosopher | Key Contributions |
---|---|
Protagoras | |
Gorgias |
Socrates: The Father of Western Philosophy
Socrates, the father of Western philosophy, created the Socratic method24. He asked probing questions to challenge assumptions and deepen understanding25. This approach greatly influenced philosophical thought in the Western tradition.
Born in 470 BC, Socrates shaped Western civilization26. His parents were a stonemason and a midwife. He loved learning and read works by philosophers like Anaxagoras24.
Despite his unattractive appearance, Socrates captivated Athens’ youth with his intellect24. He avoided politics but gained many followers. His teachings led to trouble with authorities.
In 399 BC, Socrates was charged with impiety and corrupting youth26. He defended himself without a lawyer. The court sentenced him to death by drinking hemlock242526.
Socrates focused on examining inner values, not just the external world24. He believed in self-reflection and truth-seeking. His famous quote highlights the importance of an examined life.
Socrates inspired many thinkers, including his student Plato25. His commitment to knowledge and challenging norms influenced ancient civilizations and Western thought25. Socrates continues to shape our approach to truth and self-examination.
Plato: The Realm of Forms and the Ideal State
Plato, Socrates’ student, shaped Western thought with his philosophy27. Born in Athens around 428-427 B.C., he lived during a thriving democracy28. Plato founded the Academy, the first Western university and philosophy school28.
His inquiries covered metaphysics, epistemology, ethics, and political philosophy. Plato’s ideas continue to inspire thinkers today.
Metaphysics and the Theory of Knowledge
Plato’s metaphysics centered on his theory of Forms or Ideas29. He believed in a realm of perfect, eternal Ideas beyond our physical world29.
True knowledge comes from understanding these Forms. This requires a challenging educational journey28.
The Allegory of the Cave shows the link between Forms and our world. It supports philosopher-kings as rulers who grasp the Form of Goodness28.
Ethics and Political Philosophy
Plato’s work also covered ethics and political philosophy27. He proposed philosopher-kings as ideal rulers, believing only they could truly understand reality28.
This view differed from Greek democracy. Plato favored governance by specially equipped individuals28.
Plato’s ideas on reality, knowledge, ethics, and politics have deeply influenced Western thought27. His legacy continues to fascinate scholars worldwide.
Key Contributions of Plato | Summary |
---|---|
Theory of Forms | Plato believed in the existence of a transcendent realm of perfect, eternal Ideas that served as the ultimate reality, distinct from the physical world of flux and change29. |
Concept of Philosopher-Kings | Plato proposed the idea of philosopher-kings as the ideal rulers, suggesting that only specially equipped individuals could comprehend the true reality and govern effectively28. |
Allegory of the Cave | Plato used the Allegory of the Cave to illustrate the relationship between the world of the Forms and the physical world, advocating for philosopher-kings as the rightful rulers28. |
Aristotle: The Polymath and Systematizer
Aristotle, Plato’s student, was a brilliant thinker. He made major contributions to logic, physics, biology, ethics, and political theory30. His systematic approach to philosophy laid the groundwork for Western scientific thought.
Logic and the Foundations of Western Science
Aristotle’s work in logic and scientific method greatly influenced Western science. He explored Greek ideas on animal and celestial movements30. His definition of “phusis” as growth and purpose challenged existing notions.
Ethics, Politics, and the Pursuit of Eudaimonia
Aristotle’s ideas on ethics and politics still shape modern discussions. He introduced eudaimonia, the pursuit of a good life30. His exploration of causal principles and motion left a lasting impact on philosophy.
Aristotle’s wide-ranging knowledge earned him the title “the Polymath and Systematizer”31. His contributions to various fields continue to be studied worldwide.
Polymath | Era |
---|---|
Leonardo da Vinci | 1400-1600 |
Gottfried Leibniz | 1700-1850 |
Mary Somerville | 1850-2000 |
The concept of polymaths extends beyond Aristotle. Many brilliant minds have excelled in multiple fields throughout history31. “The Polymath” book explores these remarkable thinkers across different eras and cultures.
Aristotle’s legacy as a polymath continues to inspire scholars and scientists. He reminds us of the human mind’s potential and the pursuit of eudaimonia3031.
The Hellenistic Schools: Epicureanism, Stoicism, and Skepticism
After Socrates, Plato, and Aristotle, new philosophies emerged in ancient Greece. The Stoics, Epicureans, and Skeptics dominated this Hellenistic period32. Each school had unique views on human life and happiness32.
The Search for Happiness and Inner Peace
Epicureans, led by Epicurus, saw pleasure as the ultimate good. They sought happiness through pleasure33. Stoics, with Syrian roots and Roman influence, focused on cosmic determinism and human freedom.
Stoics believed true freedom meant freeing oneself from worldly desires33. Skeptics, championed by Pyrrho and Timon, promoted dogmatic doubt. Their ideas appealed to many non-philosophers33.
Hellenistic philosophy shifted towards individual perspectives. This change set the stage for Christianity’s rise33. Epicurus consistently viewed pleasure as the ultimate good.
School | Key Beliefs | Notable Figures |
---|---|---|
Epicureanism | Pleasure as the ultimate good, pursuit of happiness through the avoidance of pain | Epicurus |
Stoicism | Living in accordance with nature, developing self-control to overcome destructive emotions, cosmic determinism and human freedom | Zeno of Citium, Chrysippus, Marcus Aurelius |
Skepticism | Propagating dogmatic doubt, suspension of judgment | Pyrrho, Timon |
Greek political power loss to Macedonians shaped Hellenistic philosophy. This change influenced Epicureanism, Stoicism, Cynicism, and Skepticism32. The focus on individual virtue and salvation was a response to political shifts.
Hellenistic schools greatly impacted Western thought33. Their ideas on happiness and inner peace still inspire thinkers today. Philosophers continue to explore these timeless human questions3233.
History: The Enduring Legacy of Ancient Greek Philosophy
Ancient Greek philosophy profoundly shaped Western thought and culture. Yet, its legacy is often romanticized and oversimplified. A closer look reveals diverse and contradictory philosophical traditions34.
Examining this complex legacy offers a richer view of Western thought’s origins. It helps us appreciate the various currents shaping our intellectual journey34.
Socrates, Plato, and Aristotle laid the groundwork for Western philosophy. They made significant contributions to politics, psychology, and ethics35.
Ancient Greek civilization’s impact goes beyond philosophy. The first Olympic Games began in 776 BCE. They continued for nearly 12 centuries35.
Greek architecture inspired the U.S. Capitol and British Museum. This rich cultural heritage has shaped our understanding of the world35.
Ancient Greek philosophy offers diverse perspectives and ideas. These continue to resonate with thinkers and scholars worldwide34.
Key Figures | Contributions |
---|---|
Socrates | Developed the Socratic method, still used today, where professors ask thought-provoking questions instead of lecturing34. |
Plato | Wrote an estimated 200 works during his lifetime, with 31 still studied today, influencing Western philosophy in various branches like epistemology, metaphysics, ethics, and aesthetics34. |
Aristotle | Wrote an estimated 200 works during his lifetime; 31 of them are admired and studied today, contributing significantly to areas such as politics, psychology, and ethics34. |
Pythagoras | Best known for the Pythagorean theorem, used in finding the area of a right triangle34. |
Hippocrates | Compiled medical methods in 60 medical books known as the Hippocratic corpus, advocating for a healthy diet, physical exercise, and case history recording in medicine34. |
Alexander the Great | Created an empire stretching from Macedon to the frontiers of India, ruling over an enormous amount of land by 323 B.C.E34. |
Pericles | Sponsored the playwright Aeschylus and helped fund the building of the Parthenon, a temple dedicated to the goddess Athena34. |
Ancient Greek philosophy continues to shape our worldview. It helps us understand our place in it34.
Embracing this rich tradition’s complexities deepens our appreciation of Western thought. It shows how ancient Greek ideas remain relevant today34.
Neoplatonism and the Later Greek Thinkers
Ancient Greek philosophy evolved beyond classical thinkers. Neoplatonism emerged in late antiquity, building on Plato’s ideas. It developed a metaphysical system emphasizing the unity of all being and divine transcendence.
Neoplatonists synthesized Hellenic intellectual heritage, blending philosophy, religion, and literature. This school of thought began with Ammonius Saccas and Plotinus in the 3rd century. It continued until the 6th century, with contributions from philosophers like Porphyry, Iamblichus, and Proclus.
Neoplatonism’s influence was widespread, impacting Western philosophy and religion. It shaped Christian theology through figures like Origen, Basil, and Augustine of Hippo. Muslim and Jewish thinkers also incorporated Neoplatonic elements into their philosophies.
36 Plotinus, Neoplatonism’s father, taught about a transcendent “One” beyond all divisions. This highest level of being transcends conceivable reality. Understanding this supreme principle requires direct union of mind with it.
37 Neoplatonism represents the final form of pagan Greek philosophy. It emphasizes a hierarchical structure of being levels. Degrees of being are also degrees of unity in this philosophy.
38 Neoplatonism’s adaptability appealed to various societal segments. It provided a philosophical background for theological discussions. The dialogue between Neoplatonism and Christianity influenced debates on complex theological topics.
37 Neoplatonism dominated Greek philosophical schools until the 6th century CE. It became the primary philosophical ideology after ancient materialist schools declined.
Key Characteristics of Neoplatonism | Explanation |
---|---|
Hierarchical Structure of Being | Neoplatonism emphasizes a hierarchical structure of levels of being, with the highest level being the transcendent “One” or “Good”. |
Monism and Unity | Neoplatonism maintains the idea of monism, the doctrine that all reality can be derived from a single principle, the “One”. |
Influence on Western Thought | Neoplatonism had a lasting influence on Western philosophy and religion, studied by Christian, Jewish, and Muslim thinkers in the Middle Ages. |
Synthesis of Hellenic Tradition | Neoplatonists engaged in a grand synthesis of the Hellenic intellectual heritage, absorbing and harmonizing philosophy, religion, and literature. |
Conclusion: The Lasting Impact on Western Thought
Ancient Greek philosophy has profoundly shaped Western thought39. The ideas of Presocratics, Plato, and Aristotle have influenced Western intellectual history40. Their diverse perspectives reveal the richness of philosophical foundations in the Western world.
Greek thought has influenced logic, scientific reasoning, ethics, and politics40. These ideas continue to inspire scholars and thinkers today39. They serve as a guide for navigating modern complexities.
Ancient Greek philosophy reminds us of the power of rational inquiry. It emphasizes the importance of pursuing knowledge and understanding. These principles remain vital in our quest for truth.
The history of40 Greek philosophy showcases the resilience of ideas39. Its legacy continues to shape how we approach life’s fundamental questions40. This makes it an essential part of our cultural and intellectual heritage.
FAQ
What is the significance of ancient Greek philosophy in the development of Western thought?
How did the Presocratics challenge traditional Greek mythology?
What were the key contributions of the Milesians and Xenophanes to ancient Greek philosophy?
How did Pythagoras and the Pythagoreans influence ancient Greek philosophy?
What was Heraclitus’ doctrine of flux, and how did it challenge notions of permanence and stability?
How did Parmenides’ philosophical system differ from Heraclitus’ views on the nature of reality?
What was the significance of Anaxagoras’ concept of nous, or “mind,” in ancient Greek philosophy?
How did Democritus’ atomic theory contrast with the idealist doctrines of Plato and others?
What was the Sophists’ contribution to ancient Greek thought, and how did they challenge traditional beliefs?
What was the Socratic method, and how did it shape the development of philosophical thought in the Western tradition?
What were the key contributions of Plato and Aristotle to the intellectual landscape of ancient Greece?
How did the Hellenistic philosophical schools, such as Epicureanism, Stoicism, and Skepticism, differ in their approaches to understanding the human condition and the pursuit of happiness?
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Source Links
- Ancient Greek philosophy – https://en.wikipedia.org/wiki/Ancient_Greek_philosophy
- Ancient Greek Philosophy: The Birth Of The Modern World – https://www.thetravelchica.com/2014/01/ancient-greek-philosophy-birth-modern-world/
- Ancient Greek Philosophy | Internet Encyclopedia of Philosophy – https://iep.utm.edu/ancient-greek-philosophy/
- Rationalism – Enlightenment, Descartes, Kant – https://www.britannica.com/topic/rationalism/History-of-rationalism
- History of Western Civilization II – https://courses.lumenlearning.com/suny-hccc-worldhistory2/chapter/rationalism/
- Rational thought – History for kids – https://www.historyforkids.net/rational-thought.html/
- Presocratics | Internet Encyclopedia of Philosophy – https://iep.utm.edu/presocra/
- Ancient Philosophy and Science | Classics – https://www.classics.pitt.edu/research/ancient-philosophy-and-science
- Pythagoreanism – https://plato.stanford.edu/entries/pythagoreanism/
- Pythagoreanism – https://en.wikipedia.org/wiki/Pythagoreanism
- Heraclitus – https://plato.stanford.edu/entries/heraclitus/
- Heraclitus | Internet Encyclopedia of Philosophy – https://iep.utm.edu/heraclit/
- The Paradox of Parmenides by Michael Levy – https://ancientlyre.com/track/1982267/the-paradox-of-parmenides
- Parmenides – https://plato.stanford.edu/entries/parmenides/
- 1.5: Parmenides and Zeno’s Paradoxes – https://human.libretexts.org/Bookshelves/Philosophy/Ancient_Philosophy_Reader_(Levin)/01:_The_Start_of_Western_Philosophy_and_the_Pre-Socratics/1.05:_Parmenides_and_Zenos_Paradoxes
- Anaxagoras | Internet Encyclopedia of Philosophy – https://iep.utm.edu/anaxagoras/
- Anaxagoras – https://plato.stanford.edu/entries/anaxagoras/
- Anaxagoras – https://en.wikipedia.org/wiki/Anaxagoras
- Democritus – https://plato.stanford.edu/entries/democritus/
- Atom – Development, Theory, Structure – https://www.britannica.com/science/atom/Development-of-atomic-theory
- 4.1: Democritus’ Idea of the Atom – https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/04:_Atomic_Structure/4.01:_Democritus’_Idea_of_the_Atom?readerView
- The Sophists – https://plato.stanford.edu/entries/sophists/
- Sophists – https://www.qcc.cuny.edu/socialSciences/ppecorino/INTRO_TEXT/Chapter 2 GREEKS/Sophists.htm
- Socrates ‑ Life & Philosophy | HISTORY – https://www.history.com/topics/ancient-greece/socrates
- Socrates – https://www.worldhistory.org/socrates/
- Socrates: The Father of Western Philosophy – https://www.ancient-origins.net/history-famous-people/socrates-father-western-philosophy-007063
- Plato – https://plato.stanford.edu/entries/plato/
- Plato: A Theory of Forms | Issue 90 – https://philosophynow.org/issues/90/Plato_A_Theory_of_Forms
- Theory of forms – https://en.wikipedia.org/wiki/Theory_of_forms
- Aristotle vs. modern physics – https://historum.com/t/aristotle-vs-modern-physics.70289/
- The Polymath: A Cultural History from Leonardo Da Vinci to Susan Sontag 0300250029, 9780300250022 – DOKUMEN.PUB – https://dokumen.pub/the-polymath-a-cultural-history-from-leonardo-da-vinci-to-susan-sontag-0300250029-9780300250022.html
- Hellenistic philosophy – https://en.wikipedia.org/wiki/Hellenistic_philosophy
- The Hellenistic World. Four schools of Philosophy: Cynics, Skeptics, Epicureans, Stoicism – https://elmarhussein.wordpress.com/2015/08/22/the-hellenistic-world-four-schools-of-philosophy-cynics-skeptics-epicureans-stoicism/
- The Lasting Legacy of Ancient Greek Leaders and Philosophers – https://education.nationalgeographic.org/resource/lasting-legacy-ancient-greek-leaders-and-philosophers/
- THE ENDURING LEGACY: HIE ANCIENT GREECE CONTINUE TO SHAPE OUR MODERN WORLD – https://medium.com/@ilokacharles4/the-enduring-legacy-hie-ancient-greece-continue-to-shape-our-modern-world-1cb1b11cc6f4
- Neoplatonism – https://en.wikipedia.org/wiki/Neoplatonism
- Platonism – Neoplatonism, Philosophy, Mysticism – https://www.britannica.com/topic/Platonism/Neoplatonism-its-nature-and-history
- Neoplatonism – https://plato.stanford.edu/entries/neoplatonism/
- The Age of Enlightenment | History of Western Civilization II – https://courses.lumenlearning.com/suny-hccc-worldhistory2/chapter/the-age-of-enlightenment/
- Western culture – https://en.wikipedia.org/wiki/Western_culture