I think the ignorance with which this book was written is summed up with the first sentence under the intelligent design section on page 187, "The impotence of Darwinian theory in accounting for the molecular basis of life is evident not only from the analyses of this book, but also from the complete absence in the professional scientific literature of any detailed models by which complex biochemical systems could have been produced..." Darwin was a brilliant man who contributed immensely to our understanding of the natural world, yet he doesn't ever claim to know everything. He had no concept of genetics or mutation, so he can't be attacked on this basis. Also, there is in fact professional scientific literature on these subjects. Here is a essay I wrote while studying evolution that explains why I think the argument of this book is a weak argument:
The book, Darwin’s Black Box, by Michael J. Behe, Ph.D. and Professor of Biochemistry at Lehigh University, describes and defends one of the concepts challenging Darwinian evolution. This concept is irreducible complexity, and he thoroughly discusses this concept in detail to uphold a common belief in the religious sector called intelligent design (ID). To begin his chapter on ID, Behe states, “The impotence of Darwinian theory in accounting for the molecular basis of life is evident not only from the analyses in this book, but also from the complete absence in the professional scientific literature of any detailed models by which complex biochemical systems could have been produced…” (Behe, p. 187). Behe’s statement was confident, but it was false.
Earlier in his book, Behe discusses the bacterial flagellum as a rotary propeller machine, that when any one component of that machine is removed, it is disabled and useless, and it could not have arisen through gradual evolutionary steps. He terms this concept as irreducible complexity (Behe, p. 39). The various parts of the flagellum could not be pieced together gradually over time because, apart from the flagellum in whole, there is no function for natural selection to act on and, therefore, would not remain in existence long enough to develop into a functional flagellum (McMaster, 2007). Either the structure came fully together simultaneously, or it wouldn’t exist at all. Behe states, “Because the bacterial flagellum is necessarily composed of at least three parts—a paddle, a rotor, and a motor—it is irreducibly complex.” (Behe, p. 72). He goes on to mention that it would take mammoth hurdles to explain it through gradual evolution, and no scientist has ever published a model that can account for it (Behe, p. 72). The flagellum therefore had to have been constructed by an intelligent designer. The mousetrap is a popular analogy of his. If any one part of the mousetrap is removed, then it is not a functional mousetrap (Behe, pp 42-43).
Fortunately, evolutionary research proved capable of performing these “mammoth hurdles.” David DeRoseir, Ph.D. and Professor of Biology at University of Chicago, researches structures utilizing electron microscopy. He had studied a component of Yersinia pestis (the bacterial causative agent of the bubonic plague) that appears to be a flagellum with a few missing components (McMaster, 2007). However, even though parts are “missing,” the structure still has function. This component of Y. pestis forms a needle-like, sharp protruding object that injects into host cells and causes the pain and damage associated with the disease. He gave testimony to having studied this structure during the federal case of Kitzmiller v. Dover School District as a rebuttal to Behe’s explanation of irreducible complexity (McMaster, 2007). Since then, more research has been performed in that area. One such study, of which DeRosier was editor, discusses how the needle structure of bacterium such as Yersinia, Pseudomonas, and Shigella corresponds to the innermost structure of the flagellum when discussing its stability (Fujii et al., 2012). In refutation to irreducible complexity, Darwinian evolution is not purposeful. What might have held one function can evolve into a completely different function as other components are added via mutation and, thence, other modes of evolution. This is called secondary adaption (Herron and Freeman, 2014). In terms of Behe’s mousetrap with parts removed, it may not function as a mousetrap, but it can and does make an aesthetically displeasing, yet fully functional, tie clip (McMaster, 2007).
Behe’s statement about no scientific research existing that provides evidence on how complex biological systems evolved is false. Evidence of possible ways in which complex biological systems evolved through the process of Darwinian evolution does exist. Irreducible complexity of biological machines like that of the flagellum is a misconception.
References Cited:
Behe MJ. (1996). Darwin’s black box: The biochemical challenge to evolution. New York, NY: The Free Press. p 42-43, 69-73, 187.
Fugii T, Cheung M, Blanco A, Kato T, Blocker AJ, Namba K. (2012). Structure of a type III secretion needle at 7-Å resolution provides insights into its assembly and signaling mechanisms. Proceedings of the National Academy of Sciences in the United States of America 109(12): 4461-4466.
Herron JC, Freeman S. (2014). Evolutionary analysis. 5th edition. Glenview, IL: Pearson Education. p 91-92, 97-104.
McMaster, Joseph. Intelligent Design on Trial. Video documentary. NOVA and Vulcan Productions, Inc. in association with The Big Table Film Company. 2007. Arlington, VA: PBS, 2007. Online at .