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Evolution Before Darwin. Ancient Cultures. Basic knowledge of animals since early times Ancient cultures had a practical knowledge of nature Essential for their hunting and fishing activities Naming of species; knowledge on behavior and natural history

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ancient cultures
Ancient Cultures
  • Basic knowledge of animals since early times
  • Ancient cultures had a practical knowledge of nature
  • Essential for their hunting and fishing activities
  • Naming of species; knowledge on behavior and natural history
  • Knowledge of edible, medicinal, and pharmacological plants
  • Knowledge of names and structures
consequences
Consequences
  • Domestication of plants and animals
  • Selective breeding
  • Use of mutants to alter crops and herds
  • Practice of artificial selection
intellectual environments among ancient human cultures
Intellectual Environments Among Ancient Human Cultures
  • Most gave a bad environment for the development of new ideas
  • Animistic: Egyptians, Babylonians, Sumerians, African tribes, Buddhism, and Amerindians
  • Monotheistic: Judaism, Christianity, and Islamism: beliefs gravitate around a specific book or dogma
hellenistic culture
Hellenistic Culture
  • Produced scientific writings for the sake of it
  • Did not believe in a single god, revealed truth, nor dogmatic book
  • There was a free flow of ideas, even contradictory (nobody felt threatened)
the first generation ca 600 550 bce
The First Generation (ca. 600-550 BCE)
  • Influenced by Eastern cultures
  • Creation of the world is the product of the forces of nature
  • There was no design. What takes place is the result of necessity
  • Rejection of supranatural explanations in favor of materialistic ones
  • The world is eternal (timeless)
slide8
They had a natural history tradition
  • They departed heavily from centuries of mythological explanations
  • A fresh start by looking at the world as it presented itself
  • Greek colonies became lively centers for a scientific attitude
  • “Everything in the world came from a single, original substance”
thales of miletus asia minor 625 547 bce
Thales of Miletus(Asia Minor, 625-547 BCE)
  • Tried to give a purely natural explanation of the world's origin
  • Water was the first principle or original substance
  • Explanation for fossils of marine animals in inland
anaximander of miletus ca 610 546 bce
Anaximander of Miletus(ca. 610-546 BCE)
  • Moisture (water) gave raised to the first animals in the sea
  • These, in turn, conquered the land
  • Believed in spontaneous generation
empedocles sicily ca 492 greece 432 bce
Empedocles(Sicily, ca. 492; Greece, 432 BCE)
  • Animal and plant body parts originated in water
  • Things attached together or they die and produce monstrosities
  • Everything in nature was composed by four elements: fire, air, water, and earth, and two forces: love and hate
anaxagoras asia minor b ca 500 d 428 bce
Anaxagoras (Asia Minor, b. ca. 500; d. 428 BCE)
  • Attributed adaptations in nature to a deliberate plan
  • Believed that the Universe had always existed
  • The origin of plants and animals is in germs in the air and ether
the second generation ca 550 400 bce
The Second Generation (ca. 550-400 BCE)
  • Belief in the inheritance of acquired characters
  • The principle of use and disuse
  • Spontaneous generation
pythagoras samos 582 sicily 497 bce
Pythagoras(Samos, 582; Sicily, 497 BCE)
  • Much emphasis on the study of nature on number and quantities
  • Nature preserves the fit and discards the unfit
heraclitus asia minor ca 540 ca 475 bce
Heraclitus(Asia Minor, ca. 540; ca. 475 BCE)
  • Everything derives from fire and fire will destroy the universe
  • “This universe, which is the same for all, has not been made by any god or man, but it always has been, is, and will be, an ever-living fire, kindling itself by regular measures and going out by regular measures”
  • In nature there is change “everything is in flux”
alcmaeon italian peninsula ca 520 bce
Alcmaeon (Italian Peninsula, ca. 520 BCE)
  • Dissected animals for the first time
  • Brain, not the heart, was the seat of senses and the center of intellect
  • Demonstrated how arteries were to be distinguished from veins
  • Discovered the optic nerve
  • Gave an explanation for the origin of the semen
hippocrates greece ca 460 370 bce
Hippocrates (Greece, ca. 460 - 370 BCE)
  • Based his ideas on observation and empirical approaches
  • Established a relationship between humans and the environment
  • Theory pangenesis (tiny particle called gemmules or pangenes are given off by every part of the adult body)
the third generation 469 322 bce
The Third Generation(469-322 BCE)
  • Epitomized by Socrates, Plato and Aristotle
  • They all lived in Athens
  • Conflicts between Idealism to the value of observation
plato athens ca 427 347 bce
Plato (Athens, ca. 427 - 347 BCE)
  • Founder of Academia
  • Founder of Idealism
  • Idealism: Whatever exists is known to man in dimensions that are chiefly mental
  • No spontaneous generation
  • Creation by supranatural powers
  • No true knowledge can be acquired through observation
aristotle macedonia 384 euboea 322 bce
Aristotle (Macedonia, 384; Euboea, 322 BCE)
  • Teacher of Alexander the Great
  • Founder of the Lyceum
  • Peripatetic school
  • Knowledge from direct observation
  • “Although I loved my teacher Plato greatly,

I love the truth more”

aristotle s contributions
Aristotle’s Contributions
  • Observed and dissected animals
  • Founder of the comparative method
  • Distinguished between homology and analogy
  • Distinguished different biological disciplines
  • Advanced the Scala Naturae or ladder of nature: “Nature passes from inanimate objects through plants to animals in an unbroken sequence”
  • Formalized species and genus
  • Classified animals
  • Recognized cetaceans as a natural group
slide23
Humans
  • Other mammals
  • Whales
  • Oviparous (egg laying) vertebrates
  • Birds
  • Amphibians and reptiles (but see snakes below)
  • Snakes
  • Fish
  • Invertebrates (without red blood)
  • Cephalopods
  • Crustacea
  • Insects, spiders
  • Other mollusks, echinoderms
  • Sponges, etc.
slide24
The world of perceived things is the real world
  • Avid collector of empirical evidence
  • All structure and biological activities have a biological meaning (adaptive significance)
  • The first asking the why-questions
  • Believed in the inheritance of acquired characters
  • Species were unchanging, fixed, eternal (neither created nor vanished)
  • The founder of teleology: doctrine or purposiveness
from greece to rome
From Greece to Rome
  • There was a decline of the Greek city-states and the emergence of the larger Hellenistic zone, from the 4th. to the 3rd. centuries BCE
  • Rome started to expand at the beginning of the third century BCE
  • It became the established commercial power in northern Africa, and the defeat of Carthage, Syria, Macedonia, Greece, and Egypt, made them the masters of the Mediterranean world by the mid second century BCE
titus lucretius carus roman 99 55 bce
Titus Lucretius Carus (Roman, 99-55 BCE)
  • Species were fixed
  • Gods pay no attention whatsoever to human beings
  • Preferred explanations on evolution related to selection than to teleology
  • Proposed the “continuity of the germ plasm” composed of unaltered particles passing down through the generations (a form of pangenesis)
  • The existence of these particles explained how characters and traits of the more distance ancestors could reappear, after the had been hidden for a generation or so
  • Rejected the inheritance of acquired characters
pliny the elder como 23 vesuvius 79 ce
Pliny the Elder(Como, 23; Vesuvius, 79 CE)
  • Uncritical compiler
  • 37-volume Historia Naturalis
  • Cited the sources
  • Marine mammals were “fish”
  • Great influence for 1700 years
lucius caelius lactantius roman b africa 260 340 ce
Lucius Caelius Lactantius(Roman b. Africa, 260-340 CE)
  • Demolished all previous rational thoughts
  • Used Christian beliefs to explain everything
  • Settled species as designed by God
  • Believed earth was flat
the end of bright times
The End of Bright Times
  • The replacement of Greek philosophies

by Christian beliefs

  • The burn of the Alexandria's library in

390 CE

  • Christianity became the official religion

of the Roman Empire

  • In 529 CE, Junian I closed all Greek

philosophical schools because of their

pagan character

  • The origin of the animals and plants was being traced back to the creation of the world as described in the book of Genesis
medieval times ca 500 1450
Medieval Times (ca. 500-1450)
  • It developed in closed conjunction with Christian thought
  • Christian theology is dominated by the concept of creation
  • All the knowledge is in the “revealed” book
  • No why-questions
  • Nature was subservient of man
  • Natural theology: God exists because of the order and harmony of the world which requires an intelligent being
slide31
Knowledge kept by Muslims and Jews scholars and Christian monks
  • Rise of Scholasticism (11th. Century)
    • It meant lack of freedom of thought
    • Truth determined by logic, not observation
    • Blind faith in the ‘Authorities’
  • Little intellectual progress until the 12th. Century
saint augustine bishop of hippo italian peninsula 354 430 ce
Saint Augustine, Bishop of Hippo(Italian Peninsula, 354-430 CE)
  • God gave nature the characteristics, the power of creating things
  • Believed in spontaneous generation
  • The successive appearance of lower species
  • Some species might not have been in Noah's ark
  • Between the 5th. and the 12th. all western knowledge was kept in monasteries
albertus magnus germany 1193 1280
Albertus Magnus([Germany], 1193-1280)
  • Opera Omnia
  • Believed in spontaneous generation, the inherited of acquired characters, and pangenesis
roger bacon england ca 1220 ca 1292
Roger Bacon(England, ca.1220-ca. 1292)
  • Opus Majus
  • Popularized the term “experimental science”
  • The incompleteness of our knowledge
  • Mankind acquires knowledge by reasoning and experience
  • He believed in spontaneous generation
the first universities
The First Universities
  • Paris (1150, 1170)
  • Oxford (1168)
  • Teaching by lecture and disputation
  • Development of Natural Theology
the renaissance 1450 1650
The Renaissance (1450-1650)
  • Began in Italy (Medicis 1450)
  • The compass (1125)
  • Paper making (1150)
  • The “Arabic” numerals (1202)
  • Gunpowder (1313)
  • Block printing from movable types Gutenberg (1450)
  • Voyages of Discovery
  • Dissections, Dissections
meaning
Meaning
  • This was a revolt against the reign of religion => against church => against authority => against scholasticism => against Aristotle
  • Examples: Galileo Galilei (1564-1642)
  • Francis Bacon (1561-1626)
  • Defended experimentalism
  • Believed in the “transmutation” of species
  • Spontaneous generation
leonardo da vinci italian peninsula 1452 1519
Leonardo da Vinci(Italian Peninsula, 1452-1519)
  • The original “Renaissance Man”
  • Anatomical work lost until the end of the 19th. century
encyclopedic natural histories
Encyclopedic Natural Histories
  • Species not mentioned in the Bible or by Aristotle
  • They compiled the knowledge of the time
  • Many times uncritically
  • Scientific illustration improved considerably
edward wotton english 1492 1555
Edward Wotton(English, 1492-1555)
  • Followed Aristotle in De differentiis animalium libri decem (1552)

eliminating however most of the

fabulous animals of Antiquity

  • Described the use of many animal products as medicines
guillaume rondelet french 1507 1566
Guillaume Rondelet (French, 1507-1566)
  • Wrote an encyclopedic work on marine animals (1554-5)
  • Described 6 spp. of cetaceans
  • Crazy about dissections
  • Environmental classification
conrad gessner switzerland 1516 1565
Conrad Gessner (Switzerland, 1516-1565)
  • Another uncritical encyclopedist
  • History of Animals (1551-1558)
  • Many genera could be split into two or more species
pierre belon french 1517 1564
Pierre Belon(French, 1517-1564)
  • L'Histoire de la Nature des Oyseaux (1555)
  • He pointed out the homologies between a bird and a man's skeletons
andreas vesalius belgium 1514 1564
Andreas Vesalius(Belgium, 1514-1564)
  • De Humani corporis fabrica (1543)
  • Empirical method: vascular + neural + muscular system
  • Demoted many of Galen’s descriptions (“Galen dixit”)
modern science 1650 1800
Modern Science (1650-1800)
  • Direct observation replaces scholasticism
  • Development of classification
  • Similar and differentiating characters
  • Center of gravity of western science moves from the Mediterranean to Northern

Europe (1642)

william harvey england 1578 1657
William Harvey (England, 1578-1657)
  • Studied at the University of Pavia
  • An Anatomical Study of the Motion of the Heart and of the Blood in Animals (1628)
  • Essays on the Generation of Animals (1651)
  • “Ex ovo omnia”: there is not spontaneous generation
slide49
Samuel Collins (1618-1685)
  • Walter Charleton (1620-1707)
  • John Ray (1627-1705)
  • Francis Willughby (1635-1672)
  • Edward Tyson (1651-1708)
  • Dissections and classifications
john ray english 1627 1705
John Ray (English, 1627-1705)
  • Established the significance of the generic principle
  • A leading contributor to the gigantic task of classification
  • From few hundred plants in the 16th. century to thousands in 1686
  • Began by grouping those organisms by their biological affinities
  • Adaptations of plants and animals as a result of God's design
slide51
Teleological explanations using divine intervention were ideal to link religion and the new scientific observations
  • He had privately problems with extinct (fossil) organisms:
    • How to explain that God created them, with what purpose?
    • How the biblical flood can account for the extinction of marine organisms?
    • How come fossils in different strata? Had there been more than one flood?
robert hooke england 1635 1703
Robert Hooke(England, 1635-1703)
  • Concluded that fossils derived from once living beings
  • Tried to explain that the finding of fossils inland as the product of flood, earthquake, or some other catastrophic event
niels stensen steno danish 1638 1686
Niels Stensen (Steno)(Danish, 1638-1686)
  • Confirmed the organic origin of fossils
  • Sedimentation had taken place in discrete episodes and that rock for undisturbed strata the lower the stratum the oldest it is
edward tyson england 1650 1708
Edward Tyson(England, 1650-1708)
  • Published in 1699 a neat description of what was probably a chimpanzee and placed it between man and monkeys in “the chain of being’
carolus linnaeus linn swedish 1707 1778
Carolus Linnaeus (Linné)(Swedish, 1707-1778)
  • Complex personality, pedantic
  • ‘Deus creavit, Linnaeus disposuit’
  • Numerologist (5, 12, 365)
  • Classified everything, including botanists
  • His ‘apostles’
slide57
1. First fully natural system of classification

2. Consistent use of the binomial nomenclature

3. Species with Latinized names (genus and species)

4. Telegram-style diagnosis for species descriptions

5. Synonymies to reach a taxonomic consensus

6. The development of hierchy (class, order, genus, species)

7. Creation of the Class Mammalia, inclusion of cetaceans

8. Creation of the Order Primates, inclusion of humans

slide58
9. Defined species as similar individuals bound by reproduction

10. Species were fixed except for small variations due to climatic/local conditions He observed that individuals tend to multiply in each generation

11. His “sexual” classifications was somewhat uncomfortable

12. Doubled the number of species known to John Ray

13. The multitude of (at least terrestrial) species known (and other he suspected yet to be discovered) left Linnaeus with another problem: how was it is possible to accommodate all of them in Noah's Ark during “the flood”?

georges louis leclerc compte de buffon french 1707 1788
Georges Louis Leclerc, Compte de Buffon(French, 1707-1788)
  • Species could not have migrated from a single point of origin
  • Different species had been created where they were found today
slide60
He substituted the “seven days” of creation by “seven epochs”
  • Epoch 1: origin of the Universe
  • Epoch 2: the cooling of earth
  • Epoch 3: the formation of a worldwide ocean
  • Epoch 4: the arisen of life in, and so on
  • Epoch 7: when man appeared
  • He said that the Earth was created 168,000 yrs ago (in private manuscripts)
james hutton scottish 1726 1797
James Hutton(Scottish, 1726-1797)
  • Internal heat of the Earth was pushing upwards land masses that were originally submerged under the seas
  • The Earth was very dynamic
  • It had been around much longer that was previously believed
georges cuvier french 1769 1832
Georges Cuvier(French, 1769-1832)
  • “Give me a bone of an animal and I will tell you how is the rest”
  • Founder of modern comparative anatomy and paleontology
  • The extinction of species had been more common than previously assumed
  • If all creatures had been created by God, then why so many had become extinct?, how come such “imperfections” could have been produced by divine design?
jean baptiste pierre antoine de monet chevalier de lamarck french 1744 1829
Jean Baptiste Pierre Antoine de Monet, Chevalier de Lamarck (French, 1744-1829)
  • The first to study and classified invertebrates in depth
  • He may have coined the term biology in 1802
slide65
The idea of evolution was a central element of this new science
  • In 1809 he proposed his “Theory of Transformation” based on the inheritance of acquired characters by use and disuse
  • Fossils represented species that had evolved into new ones
  • Believed in spontaneous generation
slide67
Needs created by a changing environment, are experienced by a “sentiment interieur,” an unconscious reaction to external stimuli found in animals with Central Nervous System, able to direct “Vital Fluids” that promote changes in parts of the body and that those changes were inherited by the next generation
  • He provided very little empirical evidence for his theories (the teeth in baleen whales that appear in the fetus but was reabsorbed later may have been the exception)