Dr. Jim Reads Darwin's Origin of Species, Chapter 11

Chapter 11, On the Geological Succession of Organic Beings

Part 1

Part 2

Part 3

"[T]he degree of perfection or highness, and natural selection will tend to render the organization of each being more specialized; though leaving many creatures with simple structures fitted for simple conditions of life, and in some cases even degrading the organization, yet leaving such degraded being better fitted for new walks of life." (Darwin, Origin of Species, p. 174).




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