Prehistory and Early Beliefs

• Psychology’s Prehistory: Humans are amateur psychologists; survival depended on observing others’ feelings and intentions.
• Neolithic Revolution: Transition from nomadic bands to villages and cities; domestication linked to staying in one place, enabling agriculture and animal keeping.
• Recent evidence suggests Göbekli Tepe predates domestication; large-scale social gatherings and religious ceremonies may have preceded farming.

Animism, Anthropomorphism, and Magic

• Animism: Attributing life to nature and natural phenomena.
• Anthropomorphism: Attributing human qualities and abilities to nonhuman beings and natural phenomena.
• Magic: Methods developed to influence spirits to change situations.

Early Greek Religion

• Olympian gods in Homeric poems depicted as often angry, rule-breaking, and largely inattentive to humans.
• After death, the soul was believed to exist but without memories or personality.
• The best life: earning glory through brave and noble actions.
• Transmigration of the soul: punishment through rebirth in different bodies until forgiven or redeemed; connected to Dionysiac-Orphic religion.
• Transmigration offered consolation and explanation for suffering and social status; linked to alternate religious movements.

The First Philosophers: Natural Explanations

• Philosophy (love of knowledge) began by replacing mythos with logos (natural explanations).
• Cosmologists: first philosophers who sought the origin and structure of the cosmos; believed the universe is orderly and explainable.

Thales of Miletus

• Quest for the arche (physis) — the one substance everything comes from; proposed water as the arche.
• Contributions: predicted eclipses, navigational methods using stars/planets, geometric reasoning.
• Significance: showed that understanding nature without supernatural ideas could help humans master their environment; open questioning and debate as a tradition.

Anaximander, Anaximenes, and Heraclitus

• Anaximander: physis as the boundless/indefinite (the apeiron) capable of becoming anything.
• Anaximenes: primacy of air.
• Heraclitus: fire as primary principle; everything is in a state of becoming, never fixed.
• Epistemology: raised the question of knowing something that is always changing; being means permanence, yet experience is changeable—knowledge becomes probabilistic rather than certain.

Parmenides and Zeno

• Parmenides: Change is an illusion; only one finite, uniform, motionless, and fixed reality exists; reasoning reveals truth.
• Zeno: used logic to show motion/change as illusion; Zeno’s paradoxes argue our senses cannot be trusted.

Pythagoras

• Numbers and ratios explain everything; mathematical order of the universe.
• Discovered the Pythagorean theorem: $a^2 + b^2 = c^2$
• Connected physical events (like string vibrations) to psychological experiences (hearing), linking mind and body.
• Believed illness stemmed from bodily imbalance; abstract numbers are real and shape the world; cosmos perceived as mathematically ordered.
• Dual-world view: physical and abstract interact; mind-body dualism; soul partially rational.
• Influenced Plato and early Christian thought.

Democritus: Atomism and Materialism

• Everything is composed of tiny atoms; their shape, size, number, position, and arrangement determine properties.
• All things, including thoughts, are made of atoms and their movements (materialism).
• Natural laws govern atoms (determinism); complex phenomena reduce to atomic interactions (reductionism).
• Sensation and perception arise when atoms from objects reach the senses and brain.
• Provided a fully natural explanation of the universe without supernatural causes.

Early Greek Medicine

• Temple Medicine: Priestly healing within temple settings; rituals and ceremonies accompanied treatment.
• Psychosomatic observations: temple medicine could be effective for psychosomatic ailments due to ritual context.
• Alcmaeon: health as balance among qualities (warm/cold, moist/dry, bitter/sweet); physician’s job to restore equilibrium.
• Brain as seat of sensation, perception, memory, thinking, and understanding (early dissection for inquiry).
• Hippocrates: disorders (mental and physical) caused by natural factors (inherited susceptibility, organic injury, fluid imbalances).
• Four elements and four humors:
  • Earth → Black bile
  • Air → Yellow bile
  • Fire → Blood
  • Water → Phlegm
• Emphasized self-healing body and physician's role to facilitate natural healing.
• Galen: linked the four humors to four temperaments (personality):
  • Phlegm → Phlegmatic (sluggish, unemotional)
  • Blood → Sanguine (cheerful)
  • Yellow bile → Choleric (quick-tempered, fiery)
  • Black bile → Melancholic (sad)

Sophists and Socrates

• Sophists: professional teachers of rhetoric and logic; asserted truth is relative; no universal truth.
• Socrates: agreed that personal experience matters but insisted truth exists beyond opinion; used inductive definition to identify essences:
  • Examine instances of a concept.
  • Identify commonalities to find its essence.
  • Seek general concepts from isolated instances.
• Essence = universally accepted definition; knowledge equates to understanding essences.
• Socrates sentenced to death at age 70 for corrupting the youth of Athens.

Plato: Forms, Knowledge, and the Allegories

• Theory of Forms: physical world is an imperfect version of perfect abstract forms.
• Knowledge from reasoning about pure forms; senses provide imperfect data.
• Analogy of the Divided Line:
  • Imagination (lowest)
  • Belief through direct experience (slightly better)
  • Reasoning about mathematical relations (better)
  • Understanding abstract forms (highest)
• Allegory of the Cave: difficulty of freeing people from ignorance; perception of reality is limited by senses.
• Reminiscence Theory of Knowledge: learning is recollection of innate knowledge prior to birth; true knowledge comes from introspection.
• Plato as a rationalist; reason > senses for knowledge.

Plato on the Nature of the Soul and Society

• Tripartite soul:
  • Rational part: immortal; linked to the forms.
  • Spirited part: emotions like fear, anger, love.
  • Appetitive part: basic needs (hunger, thirst, sex).
• Governance: rational part should guide toward long-term well-being; suppress immediate pleasures.
• The Republic: three classes aligned with soul types—workers/slaves (appetitive), soldiers (spirited), philosopher-kings (rational);
  • Believed in inherent, fixed social roles (nativism).
• Sleep and dreams reflect desires that resurface when awake; some control desires better than others.
• Plato’s legacy: skepticism toward sensory data slowed scientific progress; strong mind-body dualism (soul and body as separate).

Plato vs Aristotle: Two Paths to Knowledge

• Plato on essences: forms exist independently and are knowable through introspection (rationalism); aligned with Pythagorean/mathematical tradition.
• Aristotle: essences known through empirical observation of nature; emphasis on careful observation, analysis, and classification; logic is powerful but not the only tool.

Memory and Recall

• Remembering: spontaneous recollection of past experiences.
• Recall: deliberate search for past experiences.
• Laws of association:
  • Contiguity: things experienced together tend to be recalled together.
  • Similarity: similar things tend to be recalled together.
  • Contrast: opposites are linked in memory.
  • Frequency: more frequent co-occurrence strengthens association.
• Associationism: memory and complex idea formation can be explained by these laws.

Imagination and Dreaming

• Sensations create lasting images (retention) which constitute memory.
• Imagination = lingering effects of sensory experience.
• Dreaming results from stimulation of past images by internal or external events; skeptical about dreams predicting the future.

Motivation and Emotion

• Happiness = fulfillment of purpose.
• Action directed at satisfying a bodily appetite (hunger, thirst, comfort).
• Humans can inhibit appetites through rational control.
• Golden mean: best life is moderation; balance between excess and deficiency.

Greek Philosophy After Aristotle

• Skepticism: suspension of belief; arguments for/against doctrines are equally compelling.
  • Live by appearances (sensations, feelings) and conventions (laws, customs).
  • Belief may turn out false; avoid frustration by not committing to beliefs.
• Cynicism: simple, independent, natural life; renounce conventional desires and social norms.
  • Nonhuman animals as models for conduct; natural needs govern behavior; reject religion as guiding force.
• Epicureanism: materialism, free will, no supernatural, no afterlife; live modestly and rationally in the present.

Philosophy in Rome: Pragmatism and Virtue

• Greeks valued philosophy for its own sake; Romans valued philosophy for utility in empire.
• Stoicism:
  • Victory of virtue and law/order over material possessions.
  • Virtue is sufficient for happiness; external goods are unreliable.
  • Freedom lies in choosing whether to act according to nature’s plan.

Emphasis on Spirit and Religious Influences

• Religious forces shaping Rome and early Christian thought:
  • Vedantism: deep trance-like states as spiritual ascent.
  • Zoroastrianism: life as a battle between wisdom/good and ignorance/evil.
  • Mystery religions from the Near East: secretive rituals; themes of death, renewal, purification, forgiveness, and new life.
• Greek culture valued by Romans; Judaism emphasized monotheism and moral law with divine rewards/punishments.

Early Christian Thought

• Jesus: knowledge of good and evil revealed by God; guidance for conduct; faith-informed ethics.
• St. Paul: Messiah proclamation; synthesis of Judaic and Platonic thought; faith over reason; salvation by faith; living a good life means surrendering to God’s will.
• Humans: tripartite nature—body, mind, and soul; struggle between sinful bodily urges and divine law.

Constantine and the Christian Church

• Emperor Constantine: legalized Christianity; bishops tasked with producing a unified set of Christian documents.
• Consolidation of doctrine aided Christianity’s spread; claims of political expediency may have accompanied religious motives.

The Middle Ages: Decline and Revival

• The “Dark Ages”: loss of Greek/Roman texts; science and philosophy slowed; Europe governed by superstition and anti-intellectual sentiment.
• Church power: authority limited inquiry; questioning authority was dangerous.
• Crusades: helped reintroduce Aristotle’s writings preserved by Arab and Muslim scholars, enabling later revival.

Islamic and Jewish Influences

• Muhammad: born 570 CE; revelation leading to Islam; Islam valued for scientific and mathematical progress through Greek/Roman legacies.
• Islamic scholars studied ancient Greek and Roman works, fostering strides in medicine, science, and mathematics.

Avicenna (Ibn Sina)

• Physician and philosopher who wrote extensively across medicine, math, logic, theology, astronomy, politics, and language.
• His medical text circulated in European universities for centuries.
• Built on Aristotle but introduced lasting modifications.
• Described seven inner senses in addition to five external senses, ranked as follows:
  • Common sense
  • Retentive imagination
  • Animal imagination
  • Human imagination
  • Estimative power (judging situations)
  • Memory of past events
  • Using past experiences for decision-making
• As a physician, treated both physical and mental illnesses using diverse methods.

Averroës (Ibn Rushd) and Maimonides

• Averroës:
  • Proposed a hierarchical view of human intellect; highest level enables contact with God.
  • Observed retina as the light-sensitive part of the eye.
  • Noted historical observation: smallpox survivors show immunity, suggesting early inoculation ideas.
• Maimonides:
  • Linked ethical living with mental health.
  • Studied personality formation and psychosomatic disorders.
  • Sought to reconcile Judaism with Aristotelian philosophy; argued many Old Testament/Talmud passages could be understood via reason rather than faith alone.

Scholasticism and Key Figures

• St. Anselm: faith and reason can supplement Christian faith; ontological argument for God:
  • Thought exists as a being that cannot be greater than God; if such a being can be conceived, it must exist.
• Peter Lombard: cannot escape empirical world to know God; three paths to knowledge: faith, reason, and the study of God’s works (the empirical world).

Peter Abelard and Thomas Aquinas

• Peter Abelard:
  • Used logical methods to resolve theological contradictions.
  • Explored Realism (concepts exist independently after creation) vs Nominalism (concepts summarize experiences); proposed Conceptualism as a middle ground.
• Thomas Aquinas:
  • Integrated Aristotle with Christian thought; once Aristotelian ideas were integrated into church doctrine, they often could not be questioned.
  • Argued that faith and reason complement each other and both lead to understanding God.
• Consequence: philosophy began to separate from theology, laying groundwork for secular inquiry.

A Turning Point: Occam and Parsimony

• William of Occam: explanations should avoid unnecessary assumptions; prefer simple explanations (Occam’s Razor).
• Maintained confidence in senses to tell the world as it is; argued for direct knowledge without appeals to unseen realities.

Spirit of the Times Before the Renaissance

• Science slowly re-emerged but remained uncommon.
• Black Death reshaped beliefs: some became more religious, others rejected conventional religion.
• Society split into believers and nonbelievers; nonbelievers faced punishment.
• Learning largely constrained by Catholic Church; progress required reducing church control.

Note on Formulas and Key Terms

• Pythagoras: $a^2 + b^2 = c^2$
• Four Humors mapping (elements with humors): Earth with Black Bile; Air with Yellow Bile; Fire with Blood; Water with Phlegm
• Golden Mean: moderation as the ideal ethical standard; no fixed numeric ratio provided in the text
• Analogy and epistemology terms often referenced: Logos vs Mythos; Divided Line (implied hierarchy of knowledge)
• Ontological argument (Anselm): existence is a necessary part of the greatest conceivable being
• Occam’s Razor: prefer explanations with the fewest assumptions while preserving explanatory power
• Monotheism and ethical universalism underlie Jewish/Christian/Islamic synthesis in later periods