the impact of darwin’s theories darwin’s theories and...
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THE IMPACT OF DARWIN’S THEORIES
Darwin’s Theories and
Human Nature
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THE IMPACT OF DARWIN’S THEORIES I. Preliminary Questions:
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THE IMPACT OF DARWIN’S THEORIES
1. Is science a better methodology to discover “truth” about human nature?
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THE IMPACT OF DARWIN’S THEORIES 2. Should secular, scientific, claims to a
prescription of what is wrong with us be considered as controversial (a thus subject to rejection) as religious and philosophical descriptions?
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THE IMPACT OF DARWIN’S THEORIES II. Theories of Evolution Evolution – dictionary definitions include any
extended process with an identifiable end-product.
1. Progressive – better by-product than before?
2. Problems related to the fact of evolution vs. its mechanism.
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THE IMPACT OF DARWIN’S THEORIES Darwin and “Natural Selection” – Darwin’s
great contribution to this debate was to propose natural selection as the mechanism (Origin of the Species, 1859).
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THE IMPACT OF DARWIN’S THEORIES
Natural Selection’s 4 Empirical Generalizations:
1. Variation in the traits of individuals of a given
species. 2. Traits of parents passed on to offspring. 3. Species can increase geometrically. 4. Environmental resources can’t support this
increase.
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Therefore! You have
“survival of the fittest”
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THE IMPACT OF DARWIN’S THEORIES
Debates Within Darwinian Theories Progressive or Nonprogressive (tree- or bush-shape?) 1. Progressive – humans occupying the “top of the tree.” 2. Nonprogressive – humans occupying some part of the bush (with no “topmost” part).
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Theist or Atheist?
1. Theist – Genesis story taken literally or symbolically? 2. Atheist – Genesis story taken literally, therefore false.
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THE IMPACT OF DARWIN’S THEORIES
III. Evolutionary Theory Applied to Human Nature
Durkheim’s Standard Social Science Model 1. Irreducibility of psychological facts to
biological facts. 2. Irreducibility of social facts to
psychological facts. (facts about wholes / totalities cannot be derived from the nature of their parts).
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THE IMPACT OF DARWIN’S THEORIES This produces a threefold division: 1. Biological sciences – anatomy, physiology,
evolutionary theory… 2. Psychology 3. Social “Sciences” – sociology, anthropology,
economics, and political “science”?
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THE IMPACT OF DARWIN’S THEORIES Causal or Functional Explanation? Human Nature? No reduction of social
facts to purely psychological facts derived from biological facts.
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THE IMPACT OF DARWIN’S THEORIES
Sociobiology / Evolutionary
Psychology and Lorenz
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THE IMPACT OF DARWIN’S THEORIES Animal behavior is innate or fixed; it
cannot be eliminated or significantly modified however much the environment is manipulated. Behavior patterns are “instinctual.”
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THE IMPACT OF DARWIN’S THEORIES Based on Darwin’s theories of
evolution: 1. In a given species, traits of
individuals vary. 2. Parent’s traits tend in general to
be passed on to children. 3. Species population can increase
geometrically. 4. Support resources can only
increase arithmetically.
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THE IMPACT OF DARWIN’S THEORIES Thus, only the “fittest” survive….
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THE IMPACT OF DARWIN’S THEORIES
I. Theory of Animal Nature
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1. Lorenz’s On Aggression (1963) – describes patterns of aggressive behavior in many species, including humans.
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THE IMPACT OF DARWIN’S THEORIES 2. Two Important Concepts: a. Fixed action patterns – innate (not
learned) patterns of movement typical to each species and a drive such as feeding, reproduction, fight or flight, that causes the behavior to appear spontaneously.
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b. Innate releasing mechanism (inhibition mechanism).
Ex. “beaten wolf”
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THE IMPACT OF DARWIN’S THEORIES 3. Lorenz concentrates on intraspecific
aggression, not interspecific aggression (predatory) which he does not count as aggression.
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THE IMPACT OF DARWIN’S THEORIES
4. What is the species-preserving function of intraspecific aggression?
a. Territory b. Food c. Reproduction d. Hierarchy
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THE IMPACT OF DARWIN’S THEORIES
II. Theory of Human Nature
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1. Humans are just another animal species.
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2. Why war? Our innate drive to intraspecific aggression.
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3. Our aggressiveness is communal (most destructive fighting is not individuals, but groups).
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4. Environment became less dangerous; only danger left is other humans!
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THE IMPACT OF DARWIN’S THEORIES 5. We developed “warrior virtues” and
“militant enthusiasm” (loss of rational control and moral inhibitions against alien groups).
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THE IMPACT OF DARWIN’S THEORIES
III. Diagnosis
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1. Our physical weakness precluded an evolutionary inhibition mechanism.
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A kill inhibition mechanism?
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2. However, our big brains allowed us through technology to create artificial weapons.
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3. Thus, the “biological equilibrium” between killing potential and inhibition is upset – leading to mass slaughter of our own species.
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4. Reason, appeals to rationality or moral responsibility, cannot work to control innate aggression; it must find an outlet.
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5. We now find ourselves in a dangerous situation having both the power and the willingness (in certain situations) to destroy ourselves.
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THE IMPACT OF DARWIN’S THEORIES
IV. Prescription
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1. Eugenically “breeding out” aggression would be inadvisable since aggression might be key to our survival.
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2. “Reason can and will exert a selection-pressure in the right direction.”
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3. Self-knowledge is the first step
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4. Sublimation – team sports, movies, breaking things?
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Sense of humor?
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THE IMPACT OF DARWIN’S THEORIES
V. Critical Discussion
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THE IMPACT OF DARWIN’S THEORIES 1. Doubts about Lorenz’s understanding of
natural selection (he focuses on groups rather than individuals).
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2. Are the concepts of drive and instinct testable by scientific observation and experiment?
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3. Do animals have a true need to fight rather than just a disposition to fight under certain circumstances?
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THE IMPACT OF DARWIN’S THEORIES 4. Methodological questions – too much
focus on fish and birds, not as much focus on our closest ancestor, apes.
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THE IMPACT OF DARWIN’S THEORIES 5. Theories about competition between
hostile tribes are highly speculative, and solid evidence is hard to find (see video Warriors of the Amazon).
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THE IMPACT OF DARWIN’S THEORIES 7. Ideological motives? Justification of
violence as “natural” or “inevitable” thus encouraging aggressiveness, male dominance, wars and preparation for war, or competitive economic systems.