Natural Theology: "The Wisdom of God, Manifested in His
Creation"
Platonic 'Ideal' forms exist in Mind of Deity:
'Real' world created by God (Genesis 1:1)
Study of nature a pious activity
William Paley (1743 - 1805)
"Natural Theology" (1802)
Argument from Design
& Watchmaker Analogy
Counterargument:
David Hume
(1711 - 1776)
"Dialogues
Concerning Natural Religion" (1779)
Scala Naturae: the "Great Chain of Being"
Creation
an infinitely graduated, progressive series
Time scale short (ca. 6,000 years)
Species static: no new forms, no change, no extinction
Linnean
Taxonomy (Carl von Linne [Carolus Linnæus]
(1707-1778)
"Systema Naturae" (1735)
10th ed.: January 1st, 1758 "Birthday
of Taxonomy"
4,162
animals
described in five Categories (KCOGS)
Phylum & Family added
later: KPCOFGS
binomial nomenclature: genus
+ species names
"Ad majorem Dei gloriam": for greater glory of God
System is fixed:
just needs to be filled in
Joseph Banks
(1743 - 1820)
Voyage of HMS Niger to Newfoundland
& Labrador (1766)
Voyage of
HMS Endeavour to South Seas with
Captain Cook (1768 - 1771)
Alexander Humboldt (1769 -
1859)
Voyage
of Pizzaro (1799 - 1804) to Latin America
"Personal
Narrative" great influence on young Charles
Darwin
New forms
discovered that don't fit Scala
Extinctions
evident: Scala imperfect
Variation is
real in Space: what about over Time?
Biology in early
19th century:
Change
has occurred: how to explain it?
The
Enlightenment favors rational explanation.
Jean Baptiste de Lamarck
(1744-1829): "Zoological
Philosophy" (1809)
New
features
arise due to persistent "besoin" (need / want)
(teleological: "Final
Cause," goal-directed explanation)
Use
&
disuse alter morphology:
Altered
morphology
passed
on to offspring
(Lamarckism: inheritance of acquired characteristics)
Ex.: Giraffes stretch their necks
to feed on leaves.
Successive
generations
gradually acquire longer necks.
[or,
trees
become taller to escape giraffes ?]
Therefore, organisms change (evolve)
over time
Uniformitarianism replaces Catastrophism
in geology
James
Hutton (1726 - 1797) observed geological discontinuities
"No vestige of a beginning,
no prospect of an end."
Charles Lyell
(1797-1875): "Principles of Geology"
(1830)
Frontispiece: The
Temple of Serapis
Observable, gradual processes +
enormous time = world geology