Darwinian Revolution

Course No. 1527
Professor Frederick Gregory, Ph.D.
University of Florida
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Course No. 1527
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Course Overview

Published 150 years ago, Charles Darwin's On the Origin of Species—the text that introduced the world to natural selection—is among a handful of books that have changed the world.

Born amid a ferment of speculation about evolutionary scenarios in the early 19th century; vilified and later pronounced dead at the turn of the 20th century; and spectacularly confirmed by discovery after discovery in succeeding decades—natural selection ranks with the theories of Copernicus and Newton for its iconic stature in science.

But the route to that status has been surprisingly circuitous and uncertain. Darwin's profoundly revolutionary message has often been misunderstood, and so have his own views on evolution, the intellectual background that led to them, and the turbulent history of their reception.

Consider the following points:

  • Although Darwinism and evolution are often equated, evolution was debated long before Darwin's time. Darwin's innovation was to propose an astonishingly powerful process for how evolution took place: natural selection.
  • By 1900, Darwin's theory was near death, superseded by the widely accepted view that evolution did indeed occur, but under a purpose-driven mechanism that had little to do with natural selection.
  • In the 1930s, Darwinism made a stunning comeback as researchers realized that the small variations required by natural selection were indeed driving evolution. The resulting "evolutionary synthesis" reigns to this day.

The Darwinian Revolution—24 absorbing lectures by award-winning Professor Frederick Gregory of the University of Florida—introduces you to the remarkable story of Darwin's ideas, how scientists and religious leaders reacted to them, and the sea of change in human thought that resulted.

Perhaps more than any other idea in science, Darwin's theory of natural selection shows how a strikingly original concept can break the bounds of its discipline to influence society at large—in religion, politics, philosophy, and other spheres.

Intellectual Dynamite

Natural selection is the elegantly simple idea that those members of a species that happen to be most well adapted to their surroundings and are best equipped to survive will tend to outlast others; and that over time, species change as a result.

How did Darwin arrive at this theory? Professor Gregory shows that he did so slowly and cautiously, since he was well aware that natural selection was intellectual dynamite, implying that no divine intervention was needed to populate the Earth with a rich diversity of life forms.

In working out the details of the theory, Darwin built on his own observations and on the insights of others, but he also made amazing leaps in the face of apparently contrary evidence.

These are some of the steps to natural selection that you investigate in The Darwinian Revolution:

  • Charles Lyell's Principles of Geology argued that the forces that shaped Earth's surface were slow-acting over eons, rather than operating quickly through planet-wide catastrophes, in accord with biblical views. Lyell's theories suggested that the Earth was much older than commonly believed at the time. Darwin took Lyell's book on his exploring voyage aboard HMS Beagle.
  • Darwin's five-year expedition around the world on the Beagle was the most important event in his life, introducing him to a diverse panorama of flora and fauna that far surpassed his expectations, and which he spent years trying to understand.
  • Darwin was well acquainted with the ability of breeders to promote desirable traits in animals and plants. He took the next crucial step of asking whether this process did not also occur in the wild, under the pressure of the struggle for survival.

The theory that eventually emerged from these reflections was rushed to publication when Darwin got a letter from Alfred Russel Wallace, a British naturalist in Indonesia who had reached similar conclusions. But, despite the hurry, Darwin's resulting work, On the Origin of Species, was a meticulously argued case that led to one of the greatest paradigm shifts in the history of science.

The Darwin Debate

Professor Gregory recounts the vigorous scientific criticisms that met Origin, including these objections:

  • On the basis of the rate at which the Earth was cooling, physicist William Thomson calculated that the planet could not possibly be old enough to harbor life forms that evolved by natural selection.
  • Engineer Fleeming Jenkin argued that, contrary to Darwin's theory, favorable characteristics in an individual would have no chance of spreading through a much larger population.
  • Philosopher Ludwig Büchner praised Darwin's commitment to the concept of evolution but saw a fatal flaw in natural selection due to its purposelessness—its failure to account for progress in nature.

You learn how each of these arguments was eventually answered, including the deep mystery that puzzled Darwin himself: What are the actual "atoms" of inheritance that are passed from generation to generation and that initiate evolutionary change? The answer would come long after Darwin's death with the discovery of DNA as the genetic blueprint.

Religious Reactions

But the scientific controversies that Darwin encountered were overshadowed by the firestorm of criticism that he faced from religious thinkers, a reaction that has scarcely subsided to this day. Religious attacks on Darwin were inspired by a wide range of theological perspectives. However, most critics agreed with Darwin's contemporary, the theologian Charles Hodge, that what was original with Darwin was a mechanism that resulted from unintelligent causes; that was the core of Darwin's theory of natural selection, and that was what was unacceptable.

Ironically, the notorious Scopes "monkey" trial in 1925 focused on evolution in general, an idea that was widely accepted by many Christian thinkers. Natural selection, the radical theory that implied atheism in the eyes of many, hardly came up during the proceedings. Professor Gregory points out that the trial was a publicity stunt designed to promote the town of Dayton, Tennessee—not the persecution of a brave teacher for freely speaking out.

A noted authority on the development of modern science, Professor Gregory is uniquely qualified to probe the religious dimension of this subject, since he holds a degree from Gordon-Conwell Theological Seminary in addition to a Ph.D. in the History of Science from Harvard University. In The Darwinian Revolution, he brings the controversy up to date by carefully examining the claims of intelligent design, which is the latest and most sophisticated attempt to challenge Darwin on religious grounds.

Far-Reaching Questions

"We have every right to feel enormous pride at what evolutionary scientists have accomplished," Professor Gregory says. But he notes that Darwin's theories raise far-reaching questions about the nature of human identity, society, and the demarcation between science and the supernatural that defines the limits of human knowledge.

Explore the fascinating story of evolution in The Darwinian Revolution and let a remarkable teacher reveal the astounding implications this provocative theory has had on both science and society.

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24 lectures
 |  Average 30 minutes each
  • 1
    The Meaning of Evolution
    Why was Darwin so revolutionary and why does he remain so? His breakthrough was not in introducing the idea of evolution, which had long been debated, but in proposing how evolution occurs. In this lecture, you survey these and other themes that are developed in the course. x
  • 2
    The Way It Used to Be
    This lecture examines the traditional worldview in the West, which was based on the biblical account of creation, fixed by one 17th-century scholar at 4004 B.C. An allied idea was the Great Chain of Being, pictured as an immutable scale of life forms from the most primitive to God himself. x
  • 3
    Theories of Evolution in the 18th Century
    You study three 18th-century thinkers: Benoît de Maillet, who estimated the cosmos to be billions of years old; Georges Buffon, who believed that living things descended from more primal forms; and Pierre Simon Laplace, who proposed a developmental theory for the formation of the solar system. x
  • 4
    Fossils and Catastrophism
    At the end of the 18th century, fossils were not necessarily regarded as actual remains of living things. You learn that they became central to the work of Georges Cuvier, who connected fossils to extinct species, which he believed had died out in violent catastrophes. x
  • 5
    Theories of Evolution Just before Darwin
    The idea of evolution was in the air by the early 19th century. This lecture looks at precursors to Darwin, including Jean-Baptiste Lamarck, who wrote a systematic account of the evolution of species over time and proposed that acquired characteristics can be inherited. x
  • 6
    Why Evolution Was Rejected before Darwin
    You investigate the dubious status of evolutionary ideas in the years before Darwin's book. Among the objections: Evolution challenged the Bible and lacked convincing empirical support. Some critics even classed evolution with fringe ideas such as Mesmerism and phrenology. x
  • 7
    Darwin's Conversion to Evolution
    The young Darwin's intention to join the ministry was interrupted by an offer to travel around the world as a naturalist aboard HMS Beagle. The experience changed his life, giving him a growing conviction that species had altered over time, a conclusion he kept largely to himself. x
  • 8
    What's in On the Origin of Species?
    Darwin spent two decades developing his theory of evolution through natural selection. You learn how he was rushed to publish prematurely by the independent discovery of the same principle by Alfred Russel Wallace. Yet Darwin's book, On the Origin of Species, is a masterful statement of his idea. x
  • 9
    How Origin Fared among Scientists
    Even as Darwin's book stimulated greater acceptance of the idea of evolution, scientists criticized his specific mechanism, natural selection. This separation of the general notion of evolution from the means by which it occurs has permitted Darwinism to mean different things to different people ever since. x
  • 10
    The Religious Reaction to Darwinism
    This lecture explores the religious response to Darwin's theory. Some argued that natural selection was tantamount to atheism, raising an issue that endures to the present day. Others reinterpreted natural selection to make it compatible with a belief in God. Still others completely separated science from religion. x
  • 11
    The Social Implications of Evolution
    Those who accepted evolution in the 19th century generally considered it a purposeful or goal-directed process, rejecting the random variation of natural selection. You explore how such an understanding influenced Herbert Spencer's social philosophy of the survival of the fittest. x
  • 12
    Evolution and Heredity
    You examine the difficulty that evolutionary theory faced in showing its compatibility with a theory of heredity. Darwin proposed a particulate theory of heredity, called pangenesis. Meanwhile, Gregor Mendel, an obscure Austrian monk, developed a powerful hereditary theory based on his experiments with pea plants. x
  • 13
    A Nadir for Natural Selection
    In the early 1900s, Darwin's theory was in eclipse as its two fundamental tenets—selection and small variations—were rejected by a majority of scientists. You also see how Mendel's rediscovered work was interpreted as further evidence against natural selection. x
  • 14
    Groundwork for Recovery
    This lecture discusses how developments in cell biology in the early 20th century clarified the process of heredity, showing that small changes in chromosomes were responsible for determining larger characteristics of organisms. This hinted that Darwin had been correct to focus on small continuous variations. x
  • 15
    Human Evolution
    Darwin did not deal with the explosive issue of human evolution in Origin, but others were quick to see the implications of natural selection for the question of human origins. You learn how the discovery of Neanderthal remains and other human-like fossils fed the controversy. x
  • 16
    The Scopes Trial
    This lecture investigates fact and fiction in the famous Scopes anti-evolution trial in 1925. Supposedly, teacher John Scopes was persecuted, attorney Clarence Darrow rose to Scopes's defense and defeated prosecutor William Jennings Bryan, and the anti-evolution movement was discredited. There are problems with all three statements. x
  • 17
    Lamarckian Inheritance on Stage
    Two controversies in the 20th century show the staying power of Lamarck's theory of inheritance of acquired characteristics. In Austria, biologist Paul Kammerer claimed that bodily changes in amphibians were heritable. In the Soviet Union, agronomist T. D. Lysenko made a similar claim about food crops. x
  • 18
    Forging an Evolutionary Synthesis
    You learn how the work of population geneticists, field naturalists, and paleontologists in the early 20th century led to an evolutionary synthesis that recognized Darwin's theory of natural selection as the major agent of evolution. Factors such as Lamarckian inheritance were rejected. x
  • 19
    Evolution and Molecular Biology
    The new science of molecular biology added stunning evidence for Darwin's theory with the discovery of DNA as the carrier of genetic information. The decoding of DNA's double-helical structure by Francis Crick and James Watson shed new light on the origin of the minute variations responsible for natural selection. x
  • 20
    The Rise of Biblical Creationism
    This lecture examines the backlash against evolution by American evangelicals, who came up with increasingly sophisticated attacks on Darwinism to defend the biblical account of creation. Their tactics led to an alternative explanation of the origin of life, called "scientific creationism." x
  • 21
    Tinkering with Evolutionary Theory
    Altruistic behavior poses a problem for natural selection at the level of individuals. Therefore some scientists have theorized that selection acts on groups or even on individual genes. You investigate these proposals and also the field of sociobiology, which sees a Darwinian component to human social behavior. x
  • 22
    The Heritage of Eugenics
    You learn how evolution has inspired controversial ideas such as eugenics—the study of improving human heredity through controlled selective breeding. Eugenics led to restrictive marriage laws and forced sterilization in the United States and to mass euthanasia in Nazi Germany. x
  • 23
    Intelligent Design
    You see how the classical philosophical argument from design has been restyled "intelligent design" to attack natural selection, leading to a 2005 court case in Dover, Pennsylvania. The trial ended in an adverse ruling against a school that sought to teach intelligent design as an alternative to evolution. x
  • 24
    Adding Things Up
    In this final lecture, you take stock of the Darwinian revolution and some of the scientific, philosophical, and religious reactions to it. An analysis of these issues illuminates the difference between metaphysical beliefs and scientific explanations, and how they are inextricably linked when it comes to interpreting Darwin. x

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Your professor

Frederick Gregory

About Your Professor

Frederick Gregory, Ph.D.
University of Florida
Dr. Frederick Gregory is Professor of History of Science at the University of Florida, where he has taught for 30 years. He holds a B.S. in Mathematics from Wheaton College in Illinois, a B.D. (Bachelor of Divinity) from Gordon-Conwell Theological Seminary, an M.A. in the History of Science from the University of Wisconsin-Madison, and a Ph.D. in the History of Science from Harvard University. Professor Gregory has received...
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Darwinian Revolution is rated 4.6 out of 5 by 56.
Rated 5 out of 5 by from Excellent If you want a thorough and well-presented course on the history and science of evolution, this is one for you. I am weak in the sciences and it takes quite an effective presentation to hold my attention. The professor did hold my attention, with a few exceptions (he sometimes offered more details than I really cared to hear--again, that reflects my own peculiar problem with science). So, if someone like me can give this course 5 stars, you will have some indication of just how well this course is structured and presented. (I listened on CD and see no reason to have it on DVD.)
Date published: 2010-01-26
Rated 5 out of 5 by from History of Evolution Professor Gregory is an engaging speaker. I enjoyed listening to him. This course traces the history of evolution including Darwin's grandfather's ideas on the subject. It emphasizes that Darwin did not invent "evolution," but rather the mechanism of "natural selection." Darwin himself was not as committed to his theory as science is today. He had the disadvantage of not knowing genetics and so didn't have a good answer for how an advantageous variation wouldn't get diluted over subsequent generations of "mixing." In fact, Darwin believed that there was at least some effect due to inheritance of acquired characteristics (which was surprising). After initial success, the theory lost acceptance until the early 1900's when science caught up with it (genetics explained away the areas where Darwin was not as comfortable).
Date published: 2009-12-30
Rated 5 out of 5 by from Evolution in Context I was very pleased with this introduction to evolution - especially on the historical sequence of the development of evolutionary thought. Contrary to the simplified "sound bite" view of evolution, it did not start with Darwin, and Darwin did not "invent" it. In this course, Professor Gregory carefully covers the pre-Darwinian evolutionary thought, then covers the tortured road from the first publication of The Origin of Species through its low point early in the 20th century and on to the neo-Darwinian synthesis generally accepted by scientists today. If I did not already "know" the current state of scientific thought in this area, I would have been wondering throughout the lectures how it was going to turn out. The emphasis of the course is on the development of the scientific thinking about evolution and less about the actual mechanisms and biological details behind it (though there is some.) Keep in mind that the Professor's advanced degrees are in the History of science rather than in any of the fields of science that one see for a practicing researcher in the field. In that context, he delivers an articulate overview ofthe topic.
Date published: 2009-12-29
Rated 5 out of 5 by from Everything you wanted to know about Darwinism ... "...but didn't have time to find out. This is a downright classy course, and was a pleasure to listen to. I especially appreciated the multitude of angles and insights offered by Dr. Gregory. This is a multilayered topic, and I believe the professor touched on every single one in an evenhanded way. To his credit, Professor Gregory consistently and plainly stated his own biases. He says he dislikes arrogance, and these lectures show it. I don't recall hearing a single "politically correct" comment in the entire course. The lecture on the Scopes trial was terrific and moving. In the past, I have found some TTC courses becoming a bit too much like 'edutainment.' But this course is real college-level teaching at its finest, and is packed with solid intellectual stimulation"
Date published: 2009-09-04
Rated 5 out of 5 by from Excellent First Course This is the first TC course I completed, although I have several others in process. This was certainly a great introduction to TC. I found this course very informative and entertaining. I now have a much deeper understanding of Darwin, his antecedents and the historical (and more recent) responses to evolution. I listened to the CD's on a 2000 mile car trip. Not only did they keep me awake, they also kept me totally engaged. Professor was excellent. Course content was fascinating and worked well without reading. It has motivated me to dig into some of the "Suggested" readings.
Date published: 2009-07-09
Rated 5 out of 5 by from Comprehensive and Entertaining This course exceeded my expectations. I was expecting a dissertation on the theory of evolution but instead Dr. Gregory reviewed the "history" of evolutionary theory, including the thinking of Darwin's contemporaries. The parts of the course covering the challenges to the theory of evolution, including recent the recent "creationist" and intelligent design theories are very apropos. Professsor Gregory's interaction with the viewing audience was particularly impressive. This was the History of Science at its best.
Date published: 2009-07-09
Rated 5 out of 5 by from Light, not Heat Of course, evolution is a highly controversial subject. One should not expect a lecturer to satisfy everybody when dealing with such a topic. However, I believe that Dr. Gregory comes very close to achieving the impossible. Dr. Gregory treats the material objectively and all views respectfully. As a result, the listener is likely to gain insight, perhaps even appreciation for the other side of the debate. You will learn important distinctions between "evolution" and "natural selection." You will learn why the scientific community rejected Darwinism at the beginning of the twentieth century and what happened over the past one hundred years. You will learn what are the issues of contention today. And you will probably find your own position challenged - and improved.
Date published: 2009-03-29
Rated 5 out of 5 by from The Darwinian Revolution I have listened to many TTC tapes (over 50). Professor Gregory course on The Darwinian Revolution is one of the best. The subject matter is fascinating and he develops it clearly. This is history of science at its best. Highly recommended.
Date published: 2009-03-28
Rated 5 out of 5 by from Apropos to Darwin's 200th birthday This course would more aptly be called The Evolution of Evolutionary Theory. This course makes clear the nuanced differences in the many different theories of evolution and the actors who brought them to the scientific and religious world. This is a history of how the theories of evolution were developed and the controversies that followed their introduction, and how Darwin stood apart from the general theory and why the universality of his theory caused and is still causing debates. The Darwinian Revolution didn't end with his book The Origin of Species, but that book served as a launching pad for deeper scientific inquiry into the cells and DNA of life. It raised questions which led to the latest controversial scientific debate--Intelligent Design. Professor Gregory's lecture style is engaging and yet doesn't interfere with the message he is delivering. He gets his point across clearly and unobtrusively. I enjoyed this course thoroughly.
Date published: 2009-02-17
Rated 5 out of 5 by from Excellent As a person of science and faith I found this course thorough, well reasoned and refreshingly even handed. I hope it may promote a more cordial understanding on all sides of this contentious subject, and I believe that it will.
Date published: 2009-02-03
Rated 5 out of 5 by from I just finished watching this course. A few years ago I watched TTC's similar course The Theory of Evolution: A History of Controversy. I will try to compare the two. They both tell Darwin's story and they are both told by history professors. This course is twice as long. For me, I was happy to get the shorter version with fewer details. Both are history courses and not science courses. TTC's biology course contains lots of evolution science and it is one of my very favorite TTC courses but it is very long and contains lots of other material. TTC should make an introductory course on just evolution. History class has always been the most boring class for me. Professor Gregory's enthusiasm kept me interested though. If all my previous history teachers were like Gregory maybe I would like history class more. If you want more details, to learn about more characters who were involved then watch this course. If you want a quick overview then watch the other course.
Date published: 2009-01-31
Rated 5 out of 5 by from Excellent Overview! Once again, I am pleased with my TC purchase. After listening to this lecture series, my understanding of evolution as a concept, and of Darwin and his beliefs, was changed forever. Heck, you could even say it 'evolved.' O.k., that was bad... The professor gave an informative and entertaining overview of the concept of evolution. He spent a good deal of time informing the listener about the details of the lives of the various involved parties, in order to increase the listeners understanding about why they believed what they did (and do to this day). He not only covers the history around the era and the personalities involved, but he expounds upon the theory itself, revealing the simplicity of it and removing the subject from the murk of political and religious hyperbole. He treats no one with contempt, and takes the time to outline the major arguments for and against, including the details on how those competing theories came to be. I bought it to listen to as I did my chores, and ended up finishing the course long before I finished my chores (much to my wife's annoyance). Well worth the price and the time to listen to them.
Date published: 2009-01-21
Rated 5 out of 5 by from Great course! Professor Frederick Gregory is truly a great lecturer. After getting at the end, I enjoyed his remarks in his last lecture on the philosophical nature of the discussion, and on the belief we bring into it beforehand. Again, I enlarged my view on this subject, and got really inspired to look into the matter once again more thoroughly. I was glad he pulled into the debate contemporary people like M. Ruse, R. Dawkins, S.J. Gould, and many more. I also liked the way how he respectfully treated all views participating in the "Darwinian" dialogue. My only dissapointment (as it usually is with great lectres such as these) is that it could more longer. The professor must have skimmed only the surface a lot (which he admits at times, but encourages to read more). I wish I could hear more from this outstanding person, as I think it sometimes resembled "a ride through Louvre in a motorcycle" (in the words of T.F.X.Noble) :-) A truly great course that I recommend to everyone!
Date published: 2009-01-04
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