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Period: 427 BCE to 347 BCE
ideal form
Plato proposed that each object on Earth is merely a temporary reflection of its divinely inspired "ideal form" -
Period: 384 BCE to 322 BCE
Ladder of Nature
Plato's student aristotle categorized all organisms into a linear hierarchy that called the "Ladder of Nature" -
Period: to
Georges Louis Leclerc
Georges Louis Leclerc suggested that the original creation provided a relatively small number of founding species -
Period: to
Lyell
Lyell considered the forces of wind, water,and volcanoes and concluded that there was no need to invoke catastrophes to explain the findings of geology -
Period: to
Jean Baptiste Lamarck
Jean Baptiste Lamarck propose a mechanism for evolution -
Period: to
William Smith
William Smith recognized that certain fossils were always found in the same layers of rock -
Period: to
Georges Cuvier
Georges Cuvier advanced the idea of catastrophism -
Period: to
Cuvier
Cuvier's hypothesis of a world shaped by successive catastrophes was challenged by the work of the geologist Charles Lyell -
Lamarck
Lamarck published a book in wich he hypothesized that organism evolved through yhe inheritance of acquired characteristics -
Darwin
Darwin was the first to propose a mechanism for evolution