Behe cites Darwin’s famous sentence to support the arguments of irreducible complexity: “If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.”5 In the instance of the flagellum, and in virtually all other instances proposed for irreducible complexity, Darwin’s criteria have not been met, and an honest evaluation of current knowledge leads to the same conclusion that follows in Darwin’s next sentence: “But I can find out no such case.”
