Evolutionary Thinkers

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Presentation transcript:

Evolutionary Thinkers The Early Ideas

Baron Georges Cuvier (1769-1832) 18th c. anatomist Catastrophism Catastrophies in the past caused extinction of species; then replaced by migrating species

James Hutton (1726-1797) Scottish geologist Actualism All geological processes presently occurring also occurred in past Contrasted Cuvier Britain’s sexiest man (1755)…or not.

Sir Charles Lyell (1797-1875) Geologist Rejected catastrophism Uniformitarianism Earth has undergone, and continues to undergo, slow and steady changes Earth may be more than 6000 years old

Georges Buffon (1707-1788) Naturalist Species can change over time Changes can lead to new organisms

Erasmus Darwin (1731-1802) Charles’ grandfather Physician Turned down George III offer to be the King’s personal doctor All life may have a single source

Jean Baptiste Lamarck (1744-1829) Biologist Inheritance of acquired traits Organisms acquired traits by using their bodies in new ways Traits were passed to future generations He was totally wrong!

Charles Darwin (1809-1882) Beagle voyages to Galapagos Islands Paper: On the Origin of Species (1859) Theory of Natural selection Struggle for survival among individuals of a species

Alfred Russel Wallace (1823-1913) Joint paper with Darwin (1858) Came up with same conclusions in a letter (2 days) that Darwin took 20 years to ponder