Peter S. Williams on Intelligent Design

Peter S. Williams is a philosopher I respect very highly. Being a Christian, most of his work falls within the realm of Christian apologetics, however, Williams is also an intelligent design proponent and has produced some valuable work on philosophy of science and intelligent design theory. In other articles, I would like to look at some of his specific writings in more depth. For now, I wanted to round up his work on ID. Here it is:

Peer Reviewed Papers

The Design Inference from Specified Complexity Defended by Scholars Outside the Intelligent Design Movement: A Critical Review,” Philosophia Christi (Vol. 9, Issue 2, 2007). Also available @

Atheists Against Darwinism



Christianity, Space & Aliens

Darwin’s Rottweiler and the Public Understanding of Scientism

The Definitional Critique of Intelligent Design Theory: Lessons from the Demise of Logical Positivism

Design and the Humean Touchstone

Designed or Desinoid: Dawkins, Science & the Purpose of Life

Focus on Intelligent Design: Some Advice on Avoiding Journalistic Embarrassment

Intelligent Design, Aesthetics and Design Arguments

Intelligent Design Theory – An Overview

If SETI is Science and UFOlogy Is Not, Which Is Intelligent Design Theory?

Playing Both Sides of the Pond: British and American Belief in Creation, Evolution and Intelligent Design

A Rough Guide to Creation & Evolution

Theistic Evolution & Intelligent Design in Dialogue

‘What do you believe is true even though you cannot prove it?’ – Comparing Dawkins’ Blind Faith to Flew’s evidence

A Critique of Intelligent Design Theory by Lawrence M. Krauss

The Big Bad Wolf, Theism and the Foundations of Intelligent Design: A Review of Richard Dawkins’ The God Delusion

On the Side of the Angels: Review of Richard Dawkins’ A Devil’s Chaplain

Part One

Part Two

Part Three

Undermining Richard Norman on “Why Science Undermines Religion

The War on Science: How Horizon Got Intelligent Design Wrong

A Response to Edward Turner’s Review of A Sceptic’s Guide to Atheism

A Response to Edward Turner’s Review of I Wish I Could Believe In Meaning: A Response to Nihilism

Dawkins Ad Hominem – Misrepresented Again?

Intelligent Designs on Science

‘Is Peter S. Williams a liar for God?’  One fallible human responds to another’s critique of ‘Darwin’s Rottweiler and the Public Understanding of Scientism’

Reviewing the Reviewers – Pigliucci et al on “Darwin’s Rottweiler & the public understanding of science”

God Questions – a dialogue-Carl Stecher and Peter S. Williams (Cosmological and Design Arguments)


Book Chapters

Peter has written about intelligent design in further detail in several of his books:

-In chapters 8 and 9 in I Wish I Could Believe in Meaning: A Response to Nihilism.

-In chapters 6 and 7 in A Faithful Guide to Philosophy: A Christian Introduction to the Love of Wisdom.



Peter S. Williams and AC Grayling Debate Fine-tuning

Peter S. Williams vs. Peter Hearty on ID

Faithful Guide To Philosophy 6: Paley, Hume & Design (Teleology I)

Faithful Guide To Philosophy 7: Intelligent Design (Teleology II)

Podcast Episodes

Thinking Through Creation & Evolution

Introduction to Intelligent Design Theory

A Rough Guide to Creation

Introduction to Intelligent Design Theory (2)

How Atheists Defend Intelligent Design Theory


Blog Posts

Peter often writes about ID on his excellent blog, ID Plus.


Peter S. Williams & Denis Alexander’s Dialogue on Intelligent Design

In this post, I wanted to draw attention to a particular written dialogue between ID advocate/philosopher Peter S. Williams and biologist/ID critic, Denis Alexander. Both Williams and Alexander are committed Christians (Williams being one of the UK’s foremost Christian philosophers and Alexander being the director of the Faraday Institute for Religion and Science), so in terms of their broader worldviews, they have much in common. Denis Alexander is a Christian neo-Darwinist, which would put his views pretty much in line with the Biologos crowd (in fact he is one of the bloggers at Biologos). Alexander has critiqued various aspects of ID in many publications¹

Back in 2006, Alexander had an article published on the website called Creation and Evolution?. In it he discusses theistic evolution, creationism, and ID. Subsequently, Peter S. Williams penned an interesting piece in the form of a hypothetical dialogue called Theistic Evolution & Intelligent Design in Dialogue. There are several characters in the dialogue who are coming from various perspectives in the origins debate. This article was written as some form of response to Alexander’s initial article. In response to this, Alexander wrote Designs on Science, an open letter to the characters in Peter Williams’ dialogue, which neatly summarizes some of Alexander’s criticisms of ID. Finally, in response to Alexander, Peter Williams wrote Intelligent Designs on Science: A Surreply to Denis Alexander. This was the concluding part of their dialogue.

It is well worth reading through the dialogue from start to finish. Both authors engage in a polite and cordial fashion throughout, and much ground is covered in great depth. In particular, Williams’ concluding response is very lengthy (25.000 words with almost 300 footnotes) and very well researched, and to my mind constitutes a devastating refutation of Alexander’s objections to design. In addition to this, Williams presents a strong positive case for ID. Of course, Williams doesn’t answer everything that Alexander has written on ID but he deals with the most salient points.

In future, I shall be writing my own response to some of Denis Alexander’s more recent publications on intelligent design.

  1.  Denis Alexander has critiqued ID extensively in books such as Creation or Evolution: Do We Have To Choose?The Language of Genetics: An IntroductionRescuing Darwin: God and Evolution in Britain TodayBeyond Belief: Science, Faith and Ethical ChallengesRebuilding the Matrix: Science And Faith In The 21St Century. On top of these, he has published many articles on the topic including Is Intelligent Design Biblical?Intelligent design is not scienceA Critique of Intelligent DesignA Response to Should Christians Embrace Evolution?


Jeffrey Koperski on Two Bad Ways and Two Good Ways to Attack ID (Part 1): Two Bad Ways

In the next two (potentially three) articles I’ll be taking an in-depth look at an excellent paper written by Jeffrey Koperski, a philosopher of science at Saginaw Valley State University. Koperski has written about ID in several publications (1), which I highly recommend, and he takes a balanced and sensible approach to this topic. As far as I can tell, he doesn’t accept ID, but takes a constructively critical stance, so his work is well worth engaging with.

As one can tell from the title of the paper, Two Bad Ways to Attack Intelligent Design and Two Goods Ones(2), Koperski critically analyses two common criticisms of ID, suggesting that they are highly dubious lines of argument. He then goes on to suggest two better ways of trying to refute design. In this first part, I’ll be taking a look at what he sees as two bad arguments. In the next article I’ll then turn to what he sees as two better arguments, and find out whether or not they withstand scrutiny.

Guilt by Association & Motive Mongering

The first faulty line of reasoning that gets examined, is an argument commonly used by philosopher Barbara Forrest and many others. According to Forrest, ID is little more than stealth creationism. The arguments used in favour of design are highly suspect primarily because the major figures in the movement have religious motives and therefore don’t genuinely care about science. However, the blanket label “creationism” or “creationist” is too vague to be meaningful and only serves as a rhetorical slur. In one sense, all theists are creationists because they believe a god created the universe. However, as Koperski notes, this entails the absurdity that Christian neo-Darwinists such as Kenneth Miller are creationists but ‘No one familiar with the debate would consider him a creationist.'(3), (at least in the sense that Barbara Forrest means). To confuse matters further, there are ID proponents such as Paul Nelson, who are young earth creationists and also proponents like Michael Behe who accepts an old earth and common ancestry. Whatever the label “creationist” refers to, it’s clear that it is something religious, and to most people creationism conjures up images of religious fanatics who deny an old earth and other scientific evidences, based on literal readings of Genesis. Koperski essentially argues that this tactic is ‘what some logic texts call “stereotyping”.'(4) It could also be said that, as a response to the arguments ID advocates make, critics commit a type of ad hominem fallacy known as guilt by association, in effect saying that ID arguments fail in virtue of its advocates being creationists, and having theological motives.

The key problem with the appeal to motives, is that it tells us almost nothing at all about the quality of the arguments in question. No matter how much ‘dirt’ ID critics dig up, in the form of allegedly revealing quotations by ID theorists about what’s really driving them, it does nothing to rebut their specific arguments. Koperski writes ‘Lysenko’s theory of inheritance was not bad because the Communist Party in the Soviet Union promoted it: it was bad because the theory was an experimental failure.'(5) He also rightly calls attention to figures like Martin Luther King and William Wilberforce who were explicitly motivated by their religious views. In his book The Physics of Theism, Koperski points out that most of the founders of modern science were unequivocal about their religious motivation. He includes a quote by Isaac Newton that sounds similar to the ‘incriminating’ quotes by ID supporters that critics wield to show ID theorists are merely religiously motivated fanatics:

When I wrote my treatise about our Systeme… I had an eye upon such Principles as might work with considering men for the beliefe of a Deity & nothing can rejoyce me more than to find it usefull for that purpose.(6)

Does Newton’s admission here mean he was really a covert creationist, and therefore his work should be kept out of science? Of course not. And it’s telling that we never hear critics make the same accusations toward these other scientists and their work. Apparently, one is permitted to have a religious motive, unless you’re an ID proponent. Koperski concludes:

Newton had a religious motive for this work. The same goes for Boyle, Faraday, and many other scientists past and present. This fact does not make their work nonscience or bad science. Good science can be produced from a variety of motivations, including religious ones.(7)

Motive mongering gets the argument nowhere. If ID critics obsessively point to the theological motives of their opponents, those on the other side can do likewise, and it’s a relatively easy thing to do. Richard Dawkins remarked that ‘Darwin made it possible to be an intellectually fulfilled atheist.'(8), and therefore allies his atheism to his views on evolution. Similarly, ID critic Eugenie Scott signed the third humanist manifesto.(9) Perhaps her aversion to ID is merely a cover for her atheism? One can find similar atheistic associations amongst many other ID critics. Let’s just focus on the arguments because ‘…it seems “guilt by association” is a game that each side can play.'(10)

Before I move on to examining the second bad argument that ID critics use, I want to briefly highlight a paper that was published in response to Koperski’s paper. Christopher Pynes, a professor of philosophy at Western Illinois University, wrote a paper called ‘Ad Hominem Arguments and Intelligent Design’(11) in response to Koperski’s examination of this line of attack. Quite astonishingly, Pynes actually attempted to justify using ad hominem attacks against ID theorists. Pynes paper is one of the worst papers I’ve come across in the ID debate and I’m surprised it was published. Various good responses have been made to his paper.(12)

Methodological Naturalism: A Ground Rule or A Metatheoretic Shaping Principle?

The dispute over biological design raises a plethora of issues. One area of disagreement at the heart of considerations of the scientific status of ID, is methodological naturalism, a ‘metatheoretic shaping principle.'(13) Critics such as Robert Pennock, and in fact most critics, fall back on this objection, alleging that ID violates an essential ground rule of scientific explanation, because it appeals to non-natural concepts like intelligence. It is often claimed that methodological naturalism purifies science by keeping supernatural explanations out of the explanatory toolbox. This claim, however, has little historical support as it seems to be the case that that ‘historical confrontations between naturalism and design hypotheses were settled by inference to the best explanation…'(14) That is to say that the reason that design hasn’t been appealed to, is not because it circumvents a rule of science, but because it lacks explanatory power.

If methodological naturalism is not, after all, a logically necessary pillar of science, it could still be seen more as a provisional guideline. But as Koperski argues:

A crucial assumption in all of this is that once a concept achieves the status of a shaping principle it becomes an immutable axiom for all future science. That is a false assumption, if the history of science is any guide. Almost everything in science has been subject to change, from data and models to theories and laws.(15)

Koperski helpfully documents many cases in the history of science where various rules and shaping guidelines have been violated and changed drastically. There is no in principle reason why methodological naturalism should be exempt from similar revisions, should the evidence necessitate it. Furthermore, it is extremely difficult to see why design, supernatural or otherwise, could not count as a scientific explanation. If there are good reasons why such explanations should be excluded, Robert Pennock has neglected to provide them.

One reason that is often given is that if appeals to intelligence and supernatural agency are  permitted, what is to prevent scientists from falling back on these explanations on a whim? Surely it would hold back genuine scientific research and ignore better naturalistic explanations? Koperski sees this as a plausible objection. Of course, such worries are always a risk, however this would not be a problem for scientific explanations per se, but a potential problem for the conduct of certain scientists. Furthermore, it’s important to look to history to see whether this is a legitimate worry. Is it historically the case that scientists who were theists, and didn’t formally affirm a doctrine of methodological naturalism, became lazy and quickly resorted to supernatural explanation? It certainly wasn’t a problem for Isaac Newton and ‘The history of science remains uncooperative on this point…'(16). To sum up, Koperski argues strongly that methodological naturalism isn’t an inviolable law of science. When viewed more wisely as a provisional shaping tool, it takes away the luxury of excluding design explanations in principle, and forces us to consider the biological evidence on its own grounds. If our scientific study of the natural world cries out for an explanation that appeals to design, so be it.


Critics of ID ‘often use fallacies that should be familiar to any logic student.'(17) This is a curious tendency that I have often found in my reading of the critics also. Of course ID proponents aren’t always blameless, but logical fallacies (informal ones at least), amongst ID critics seem conspicuously pervasive. The two arguments examined in this article are just a couple of examples of the weak argumentation that are used to refute ID. In the next article I will examine the two additional arguments which Koperski reckons are more promising lines of attack.


  1. Koperski has written about ID in Two Bad Ways to Attack Intelligent Design and Two Good Ones(Zygon, vol.43, no.2 , June, 2008), Intelligent Design and the End of ScienceAmerican Catholic Philosophical Quarterly, 77 (4):567-588 (2003), The Design Revolution (book review)American Catholic Philosophical Quarterly, 78 (4):674-679, (2004), Motives Still Don’t Matter: A Reply to Christopher Pynes (co-authored with Andres Ruiz), Zygon 47 (4):662-665, (2012), Teleological Arguments for God’s Existence (co-authored with Del Ratzsch), Stanford Encyclopedia of Philosophy (2015), and in chapter 5 of his book The Physics of Theism: God, Physics, and the Philosophy of Science (Wiley-Blackwell, 2015)
  2. Jeffrey Koperski, Two Bad Ways to Attack Intelligent Design and Two Good Ones, (Zygon, vol.43, no.2 June, 2008).
  3. ibid. p.434
  4. ibid. p.435
  5. ibid. p.436
  6. Edward B. Davis, Newton’s Rejection of the ‘Newtonian World View’: The Role of Divine Will in Newton’s Natural Philosophy (In Facets of Faith and Science: The Role of Beliefs in the Natural Science, edited by Jitse M. van der Meer), Vol. 3, 75–96. Lanham: University Press of America (1996), p.78

  7. Jeffrey Koperski, The Physics of Theism: God, Physics, and the Philosophy of Science (Wiley-Blackwell 2015), p.207.
  8. Richard Dawkins, The Blind Watchmaker: Why the Evidence of Evolution Reveals a Universe Without Design (Norton & Company, Inc, 1989), p.6.
  9. Katy Hall, Eugenie Scott, Available at:
  10. Francis Beckwith, How to Be An Anti-Intelligent Design AdvocateUniversity of St. Thomas Journal of Law & Public Policy 4.1 (2009-2010), p.39.
  11. Christopher Pynes, Ad Hominem Arguments and Intelligent Design: Reply to Koperski, Zygon: Journal of Religion and Science 47(2):289–97, Available at:
  12. Koperski, along with Andres Ruiz, responded to Pynes in ‘Motives Still Don’t Matter: Response to Pynes’. Casey Luskin also wrote two responses to Pynes here and here.
  13. Jeffrey Koperski, Two Bad Ways to Attack Intelligent Design and Two Good Ones, p436.
  14. ibid.p437
  15. ibid.p437
  16. ibid.440
  17. ibid.434