Irreducible complexity, bacterial flagellum and the Type III Secretory System

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Michael Behe made the bacterial flagellum famous in his renowned bestseller, Darwin’s Black Box. For years critics of intelligent design have tried to refute Behe’s theory of irreducible complexity by claiming that the Type III Secretory System found in some bacteria was a precursor to the flagellar motor Behe made famous.

How exactly do we know the flagellum came first? In a 12-minute video discussion, Stephen C. Meyer explains how we know this and highlights four good and independent reasons the Type III Secretory System it isn’t ancestral to the flagellum.

Stephen C. Meyer is the author of The New York Times best selling book Darwin’s Doubt: The Explosive Origin of Animal Life and the case for Intelligent Design (HarperOne, 2013). For more information on the book and to order your copy visit

Check out these other videos with Stephen C. Meyer:
Stephen C. Meyer: Is intelligent design science? Signature in the Cell and Darwin’s Doubt

Stephen Meyer on Intelligent Design What is the origin of digital information found in DNA?

Dennis Prager talks with Dr. Stephen Meyer about Darwin’s Doubt, evolution and intelligent design