PHIL 20A: History of Philosophy - Key Concepts from Hesiod to Thales

Class Structure and Objectives

  • Cover syllabus and course outline.

  • Discuss background of Greek thought with focus on Hesiod and Homer.

  • Explore primary sources for Presocratic philosophy.

  • Introduction to Thales.

Hesiod and Homer

  • Key figures in Greek antiquity influencing early philosophy.

  • Hesiod (750-650 BCE) authored "Theogony" and "Works and Days" - foundational texts.

  • His works provide initial philosophical context for Presocratic philosophers.

Hesiod's Contributions

  • "Theogony" consolidates Greek mythology, explaining the birth of gods.

  • Universe depicted as a beautiful and ordered "kosmos" (intelligible whole).

  • Suggests an organizing principle of the kosmos and human capability to understand it.

  • "Works and Days" focuses on moral order established by Zeus, emphasizing divine justice and human ethics.

Homeric Influence

  • Homer’s epics (Iliad and Odyssey) shaped Greek education, religion, and morals.

  • Depictions of gods as anthropomorphic yet morally ambiguous.

  • Heroes embody virtues such as courage, loyalty, and wisdom, foundational to Greek ethical views.

Ancient Ionia and Presocratics

  • Many Presocratics, including Thales and his successors, emerged from Ionia.

  • Political structure: city-states (poleis) with distinct cultural ties to mainland Greece.

  • Ionians were influenced by neighboring cultures in areas such as religion, medicine, and sciences.

Cultural and Societal Contexts

  • Ionia had a secular societal structure, allowing speculative thought on natural and moral issues.

  • Conditions fostering philosophical inquiry: freedom of expression, wealth accumulation, intercultural contact, and public debate.

Sources on Presocratic Philosophy

  • Much of our knowledge comes from later authors (Aristotle, Plato, etc.), who often had biased interpretations.

  • Fragmentary evidence: quotes and testimonies rather than complete works.

The Milesians and Their Philosophy

  • Central themes: cosmogony, cosmology, and arche (fundamental principles).

  • Focused on understanding the primary substance of the kosmos.

Thales: The First Philosopher

  • Regarded as first philosopher, engaging in rational inquiry into the natural world.

  • Influential in various scientific domains (astronomy, mathematics).

  • Key contributions include the assertion that water is the arche of all things, connecting material substance with existence.

Thales and Natural Philosophy

  • Developed ideas on matter's fundamental nature, moving beyond divine attributions.

  • Proposed that the earth rests on water, explaining geological phenomena like earthquakes.

  • Introduced the idea of panpsychism, suggesting all things possess a soul or divine element.

Unresolved Issues and Interpretations

  • Questions arise regarding Thales' position on opposites (e.g., fire vs. water).

  • Suggested interpretations of Thales’ statements: cosmological vs. cosmogonical origins in water.

  • Lack of concrete evidence complicates the clarity of his philosophical assertions.