Thursday, August 30, 2012

Historical Influences on Darwin



1. Perhaps the most influential scientist ever was Charles Darwin. Obviously known best for his theory of evolution, and his published work On the Origin of Species. But who and what gave Darwin the foundations for his theory? Who was it that sparked Darwin’s interest that led him to form the theory of evolution? In my opinion, the scientist who had the most profound influence over Darwin was the geologist Charles Lyell.
2. Charles Lyell was a British born lawyer turned geologist. His contributions to the evolutionary theory were enormous. Lyell first began studying under the catastrophist William Buckland while attending Oxford University, however Lyell began to doubt the theory after his professor tried to link catastrophism to the Bible. Lyell believed that science should built on scientific observation and not, “susceptible to wild speculations or dependent on the supernatural.” After this Lyell set out to make sense of why the earth looks the way it does. Lyell's version of geology came to be known as uniformitarianism, because of his insistence that the processes that alter the Earth are uniform through time. Lyell argued, “that geologic formations were the result of steady cumulative forces of the sort we see today.” Lyell created a powerful lens for viewing the history of the Earth scientifically. Because of Lyell’s theory he enabled Darwin to decipher the history of the Canary Islands by applying Lyell's ideas. “He influenced Darwin so deeply that Darwin envisioned evolution as a sort of biological uniformitarianism.”
3. The idea that Lyell had the most influence over Darwin is the point that individuals do not evolve. Populations do. Individuals cannot change their heritable traits; they can only pass them on. Evolution does not occur within a generation. It occurs between generations. Lyell had argued that, “geologic formations were the result of steady cumulative forces. Darwin had seen them . . . He imagined the eons it had taken to raise the fossilized trees in sandstone (once seashore mud) to 7,000 feet where he found them. Darwin began thinking in terms of deep time.” Therefore Darwin began forming the idea that, much in the way that over a long period of time the earth’s structure changed, over long periods of time species evolved as well.
4. Without the influence from Charles Lyell, Charles Darwin would not have been as successful coming up with his theory of natural selection. Because Lyell believed that science should remain separate from religious views and supernatural thought he set the groundwork for Darwin’s theory of evolution. Like Lyell, Darwin believed that over time things gradually change and evolve, things don’t just magically happen, it’s a long process. Without Lyell’s “uniformitarianism” and the idea that things progressively change over time, Darwin might not have recognized the early signs that eventually led to his evolutionary theory.
5. The church had a profound affect on Darwin and the eventual publication of his book On the Origin of Species however it did not deter him from publishing his views. At the time it was dangerous and extremely rare to question the church, and that is exactly what evolution does, it challenges creationism and the idea that the universe and all living organisms originate from a divine creation. However, Darwin was not intimidated and was unafraid of the repercussions that publishing the theory would bring. Because of his courage, he inspired thousand of scientists to follow in his foot steps and further the study of evolution.
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Happy Blogging!!
~Stacy


6 comments:

  1. I'm starting to wonder if Lyell saw Darwin as maybe a younger brother, since he was older... I'm wondering?

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  2. That's a great point! After reading some about the relationship between Lyell and Darwin, that statement could be very true. Lyell took Darwin under his wing in a sense, much in the way an older brother would take a younger brother under his wing. Interesting.

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  3. I agree with you that without Charles Lyell, Charles Darwin might not have been able to be successful with his theory. But i also think that without Charles Lyell, scientist might have taken a little longer to figure out that Earth was older than they had expected.

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  4. Stacy,

    Great blog.

    It looks like more than half of the class recognized Thomas Malthus as most influential to Darwin’s mechanism of natural selection; therefore, I really enjoyed reading your argument for Charles Lyell.

    It is interesting how the culture of science is dependent on other scientists’ ideas, it’s a collaborative process (I love it). Lyell’s uniformitarianism theory is just that, in regard to Darwin’s theory. As I do understand how Lyell influenced him regarding how past processes are still ongoing today, it is very difficult to put into perspective how old the Earth is today. Darwin’s thought process must have been brain-splitting!

    I wouldn’t give Darwin too much credit for standing up to the church, though. He did have many reservations in regards to finally publishing his work. It was the challenge of Wallace publishing first that was penultimate to Darwin publishing. Nonetheless, Darwin did have the most empirical research.

    Israel

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  5. Stacy,

    I'm sure this is no surprise to you, but your blog was quite insightful. The theory that Lyell had on populations evolving more than really individuals is fascinating. I can say I completely agree with his works and that he was if not one of the most influential scientists Darwin had to look up to, the most influential.

    In a way he gave Darwin another pathway or perspective of evolution. To look at the picture as a whole, as to looking at it throughout individuals. Because we are all living organisms and our past heritage and genes make us what we are. And so you can take that information and see that when we evolve, we evolve within our population, not individually.

    Some interesting information you posted up. So on behalf of our class, thank you!

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  6. Very good post. Thorough and very well-written. It was enjoyable to read.

    You highlight the issue of time, which was one of the greatest contributions of Lyell to Darwin. Up until that time, it was generally accepted that the earth was only about 6000 years old. Uniformitarianism demonstrated that the earth was actually millions (now billions) of years old. That gave evolution by natural selection time to work that it didn't have before.

    I also like how you point out that Lyell showed Darwin how important it was to separate science from religious beliefs. That is a point no one has ever raised before. Good job.

    The only point I need to argue is your suggestion that Darwin was 'not intimidated' by the church's influence. That is very far from the truth! He was actually scared to death and it led to a 20+ year delay in the publication of his work. He was worried that the repercussions would negatively impact his professional life and also his family, particularly his wife who was devoutly religious. He only published when Wallace presented him with his own version of Darwin's theory and Darwin realized he was about to lose all credit for his work.

    Other than that point, very well done.

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