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James Hutto
the theory of uniformitarianism , which had been developed by James Hutton.Held that the natural forces now changing the shape of the earth's surface have been operating in the past much the same way. -
Thomas Malthus
Malthus observed that sooner or later over population will be hit by famine and disease -
Lamarck
The first was the theory of use and disuse; the idea that body parts used more often become stronger and larger, while parts not used slowly waste away and disappear. -
Lamarck
The second idea was the inheritance of acquired characteristics theory, the concept that modifications that occur during an organism's lifetime are passed on to its offspring. -
Darwin
Took his trip and Discovered evolution through natural selection during (1831-1835) -
Charles Lyell
Charles Lyell believed that there primarily have been slower, progressive changes. Lyell documented the fact that the earth must be very old and that it has been subject to the same sort of natural processes in the past that operate today in shaping the land. -
Alfred
Helped discover natural selection -
Darwin
he examined human evolution and sexual selection -
Alfred
Wrote a book in it he proposed that natural selection could cause the reproductive isolation of two varieties by encouraging the development of barriers against hybridization, and thus contribute to the development of new species.