A common slogan in religious apologetics is to claim that a-theists do not really understand what theism is, and that most atheistic critiques of theism hit the wrong target. Such criticisms have been expressed by apologists such as David Bentley Hart in The Experience of God, and Randal Rauser in “Atheists Who Don’t Know What They Don’t Believe In.” Among others, philosopher Daniel Linford has responded to this talking point in his article “Do Atheists Reject the ‘Wrong Kind of God’? Not Likely.” Moreover, such a critique misses the mark, since, even if the average atheist on the street might not have the most extensive knowledge of theology when put on the spot, there are plenty of professional atheist philosophers, such as Graham Oppy, who respond precisely to theological arguments in works like Arguing About Gods.
But what is this objection really all about?
Atheists, in denying religions like Christianity, and thus doubting the existence of Yahweh, often express that they doubt the gods of other religions as well, such as Allah, Apollo, Thor, etc. This has led some apologists, like Rauser, to claim:
“To be sure, they are able to say in a piecemeal fashion ‘I don’t believe in Yahweh, Thor or Allah…’ but they can’t get down to the essence and provide a succinct definition of the type of which each of these is a token.”
First, I would be curious as to how many theists or religious people can give succinct definitions of theological terms when put on the spot. Moreover, how many of the religiously affiliated would even agree with the arguments of theologians? Christian philosopher David Hart (The Experience of God, pg. 24) even acknowledges that he finds many of the beliefs of ordinary theists to be weak and untenable:
“There would not be so many slapdash atheist manifestos, in all likelihood, if there were not so many soft and inviting targets to provoke them: young earth creationists who believe that the two contradictory cosmogonic myths of the early chapters of Genesis are actually a single documentary account of an event that occurred a little over six millennia ago, and that there really was a Noah who built a giant ark to rescue a compendious menagerie from a universal deluge, or Hindu nationalists who insist that Rama’s Bridge was actually built by Hanuman’s monkeys, and so forth.”
Instead, Hart (pg. 30) offers what he considers to be the “correct” understanding of God:
“To speak of ‘God’ properly … is to speak of the one infinite source of all that is: eternal, omniscient, omnipotent, omnipresent, uncreated, uncaused, perfectly transcendent of all things and for that very reason absolutely immanent to all things. God so understood is not something posed over against the universe, in addition to it, nor is he the universe itself.”
Sure, if we were to ask medieval theologians like Anselm or Aquinas (who owe much of their ideas to earlier Pagan philosophers like Plato and Aristotle), we might get a definition similar to that. But, can this really be taken as descriptive of how most theists, particularly those devoted to particular religious traditions, such as Christianity, would define “God”? Furthermore, do we see this understanding of God reflected in the earliest traditions of Christianity, before the writings of theologians centuries later? Not really.
Consider how the apostle Paul (1 Thessalonians 4:16-17) describes his understanding of God in relation to the Earth:
“For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever.”
As NT scholar Bart Ehrman (God’s Problem, pp. 243-244) explains about Paul’s understanding of God’s placement in respect to the Earth in these verses:
“The entire passage presupposes an ancient cosmology in which the universe we live in consists of three levels (sometimes called the three-storied universe). There is the level where we human beings now live, on the flat earth. There is the realm below us where the dead exist (e.g., in Sheol). And there is the realm above us, where God — and now Christ — lives. In this understanding, Christ was once with us on our level, then he died and went to the lower level. But he was raised from the dead, to our level, and then ascended to the level above us … to meet the Lord above, in the air. That’s how Paul thought — completely like an ancient person who didn’t realize that this world is round … In our cosmology, there is no such thing as up and down, literally speaking.”
In placing God literally in Heaven, above the Earth, Paul (one of Christianity’s earliest founders) is clearly understanding God as “something posed over against the universe,” despite whatever arcane philosophical verbiage later theologians like Hart want to use to defend Christian theism in modern times. A lot of atheists, thus, tend to dismiss the theologian’s God as unreflective of ordinary theistic beliefs. For the most part, I agree with them. But, theologians are theists to, and if an atheist wishes to be robust in denying every kind of theism that exists, including the most formal and articulated version of the theologian’s God, then they need to be familiar with why atheist philosophers disagree with the theologian’s God as well.
Frequently, apologists try to distinguish between the monotheistic conception of ‘G’od and the polytheistic ‘g’ods, as though they were entirely unrelated. An atheist states that she does not believe in the God of Christianity for the same reasons that she does not believe in Apollo, but then the apologist respond that this is not the correct conception of theism.
For example, Hart (The Experience of God, pg. 28) argues:
“There are two senses in which ‘God’ or ‘god’ can properly be used. Most modern languages generally distinguish between the two usages as I have done here, by writing only one of them with an uppercase first letter, as though it were a proper name — which it is not. Most of us understand that ‘God’ (or its equivalent) means the one God who is the source of all things, whereas ‘god’ (or its equivalent) indicates one or another of a plurality of beings who inhabit the cosmos and reign over its various regions. This is not, however, merely a distinction of numbering, between monotheism and polytheism, as though the issue were merely that of determining how many ‘divine entities’ one happens to think there are. It is a distinction, instead, between two entirely different kinds of reality, belonging to two entirely disparate conceptual orders.”
First, I wonder if these supposedly different conceptions are really as disparate as Hart thinks. After all, in the Christian Bible, Yahweh is depicted flying in a chariot (Ezekiel 10), in a manner not terribly different from Apollo. Moreover, when Hart defines ‘G’od as something that is “omniscient, omnipotent, omnipresent,” these attributes are reflected in Apollo as well. Apollo has knowledge of the future (omniscience), miraculous powers (omnipotence), and is able to appear to appear suddenly mortals, no matter where they in the world (omnipresence). I suppose a difference could still be identified, based on the prefix omni-. After all, even if Apollo knows the future and can perform miracles, that does not necessarily entail that he is all-knowing or all-powerful. Perhaps it would be more accurate to say that Apollo is super-potent, super-knowledgeable, and super-present, but not quite omniscient, omnipotent, or omnipresent. But these are still heavily related concepts. I can see why Hart would want to distance himself as much as possible from the concept of ‘g’ods, since most people do not take the idea of polytheistic gods very seriously anymore. But these are hardly “two entirely disparate conceptual orders.” An atheist can deny both on fairly unilateral grounds.
What is “a-theism,” then, if we define the concept of God and theism in this way?
What’s especially important is that both the concept of ‘G’od and ‘g’ods involve agency, consciousness, and what we would call mental attributes. Non-conscious, unaware things cannot be omniscient or omnibenevolent. For this reason, theologian Randal Rauser defines “minimal” theism as the view:
“Theism is minimally the position that the ultimate cause of everything that contingently exists is an agent cause. Thus, God is minimally the ultimate agent cause of everything that contingently exists. So if you believe that God exists as defined then you are a theist. If you believe no God exists as defined then you are an atheist.”
I would define myself as an atheist, and I think that my beliefs deny exactly the kind of God that Rauser is describing.
I define my atheism as the view that no agencies exist that can meaningfully be identified with ‘G’od — in the sense of an ultimate agent cause upon which all contingent things are dependent that is immanent throughout the cosmos — or ‘g’ods — in the sense of immortal supernatural agents that inhabit the cosmos and rule over certain portions and aspects of it — either because the atheist believes a) that there is good probability that such agencies do not exist, or b) that the concepts of such agencies are ultimately incoherent, so as to rationally make impossible their existence, or c) that there is no evidence or successful arguments to establish the existence of such agencies.
That is a definition of atheism that includes both ‘G’od in the monotheistic sense, as well as polytheistic ‘g’ods. Why do I not think that such agencies exist?
First, because I think that the problem of agent over-detection often causes humans to project agency and personality onto otherwise impersonal and unconscious phenomena (for a further discussion of the causes of supernatural belief, including “counterintuitive agency,” see epistemologist Konrad Talmont-Kaminski’s article “Werewolves in Scientist’s Clothing: Understanding Pseudoscientific Cognition”, as well as Stewart Guthrie’s Faces in the Clouds) . After all, polytheistic gods who control the oceans, harvest cycles, and the heavens derive from the early human superstition to project agency onto natural phenomena. Hence why the ancients associated planets with deities, thought the movement of celestial bodies could predict the future, and sought to propitiate invisible beings to improve the weather.
The concept of the monotheistic ‘G’od suffers from the same problem of agent over-detection, since it views things like the origins of our universe, or the necessary source of all being, as something that is an agency, or at the very least mental. The theologian’s God is nothing more than the projection of a sort of ghost (or Geist, if you will) onto the universe, or onto being and existence, or even onto how we abstract and conceptualize philosophy. If the ultimate source of these things, however, does not involve agency, and is something unconscious, impersonal, and reducibly non-mental, then the monotheistic ‘G’od does not exist.
I am not only an atheist but also a naturalist, meaning that I think that the universe, being, and existence can be fully explained in “natural” terms, without the need of theism or supernaturalism . In a minimal sense, philosopher Graham Oppy (The Best Argument Against God, pg. 11) defines naturalism as follows:
“Naturalism says that causal reality is natural reality: the domain of causes is nothing more nor less than the natural world.”
This often raises the question of what is meant by the term “natural.” Different definitions of the natural have been proposed by different naturalist philosophers, but this does not mean that they have nothing in common. As Oppy (pp. 12-13) explains:
“’Minimal naturalism’ admits of elaboration in many different — mutually inconsistent — ways. Any suitably elaborated naturalism will hold that some features of the natural world are primitive — not susceptible of further explanation — whereas other features of the natural world are fully explained in terms of those primitive features. Thus, for example, some naturalists suppose that the primitive features of the natural world are physical features — i.e. features that lie in the proper domain of the discipline of physics. Other naturalists suppose that there are features of the natural world — for example, the psychological state of human beings — that cannot be fully explained in terms of fundamental physical properties. The key point to note is that all naturalists suppose that there are no supernatural causal properties — and so, in particular, there are no supernatural fundamental causal properties.”
This gets into what is meant by the natural-supernatural distinction. I discuss this distinction further in an academic conference paper that I presented on this topic, but here are a few points that should suffice to explain why naturalism (at least my version of naturalism) denies the existence of God:
The Natural vs. the Supernatural
Most commonly (though not in all iterations of naturalism) naturalism is associated with physical materialism, in the sense that everything that exists is physical or can be causally explained through physics, so that physics can be said to be a causally complete picture of reality. I discuss some of the conceptual issues that arise when equating physics materialism with metaphysics in my essay “Science, Philosophy, and Placement Problems,” and I also identify as a physicalist. However, for the purposes of denying the supernatural, strict physicalism does not need to be appealed to, rather than some more minimal descriptions of naturalism.
As we saw in the discussion above, theism involves projecting agency onto nature. This is very similar to a definition of religious belief, defined more generally, proposed by anthropologist David Eller (The End of Christianity, pp. 274-275):
“Religion is that worldview, that paradigm, which sees nonhuman/superhuman minds/wills/intentions at work and which ‘explains’ events and legitimizes relations and institutions in terms of these beings and their wills.”
Naturalism sees no underlying consciousness, wills, or intentionality behind our universe, or the nature of being and existence. Instead, our ultimate reality is blind and unintentional . Hence, what is usually meant when something is said to have a “natural explanation.” Something that happens naturally occurs without any judgment or design, but as the result of mechanical forces. The universe was created for anything, it not designed for anything, nor is it moving towards anything. Naturalism predicts a “blind” cosmos (of the very sort I argue that we live in).
This relates to a definition of the ‘natural’ proposed by naturalist philosopher Richard Carrier (“On Defining Naturalism as a Worldview“):
“Naturalism is true iff everything that exists is either ontologically reducible to the nonmental, or causally reducible to the nonmental, or both … For A to be ontologically reducible to B, there must nothing in A that is not made up of elements of B … For A to be causally reducible to B, it does not have to be ontologically reducible to B or to anything else, it only has to be entirely causally explained by B or some arrangement of B … A mental object is any object that is distinctive of the contents or activity of a mind, in contrast to what we do not consider as such. The most obvious examples of mental objects in this sense are thoughts, perceptions, and emotions.”
At first glance this would appear to be a somewhat odd or arcane way of defining the ‘natural’, but Carrier is making a crucial metaphysical point about lower order versus higher order principles: naturalism entails that object or machine comes first, and mind second. Hence why most naturalists (including myself) are mind-body physicalists. There can only be natural consciousness from this understanding of naturalism if there is an object like a physical brain to support it.
Supernaturalism entails that mind comes first, and object or machine second. Hence why theologians propose ‘G’od as an agency or consciousness that is the necessary cause for everything that contingently exists, such as our physical universe. They put a mind, will, or intentionality at the lower order level of our universe’s metaphysics, whereas in naturalism mental properties are emergent only at the higher order lever, and are in fact contingent upon lower order non-mental causes, such as atoms and bio-chemistry. This also gets back to the issue of religious belief and agent over-detection. Theists project agency onto otherwise primitive, lower-order features of being and our universe that naturalists argue are in fact impersonal and non-mental. Hence why the theist projects an extraneous ghost or Geist onto our universe, or onto being and existence, or even onto how we abstract and conceptualize philosophy. Denying this kind of theism is really quite simple. One is simply denying the existence of such agencies, consciousness, or Geist.
This definition of the supernatural also captures polytheistic ‘g’ods as immaterial beings that inhabit and intervene in our physical universe. No such irreducibly mental beings exist. Only physical brains can support mental properties, and gods like Apollo do not have physical brains that they are contingent upon (otherwise they would be mortal, just as humans die when their physical brains deteriorate, since mental states are contingent upon objects or machines like brains). Furthermore, this definition of the supernatural also explains why things like souls or ghosts do not exist in naturalism, or even abstract intentionalities like Karma. All such concepts involve minds, wills, or intentionalities coming first, and not being contingent upon objects and machines. You cannot break a soul down into non-soul parts. But, in naturalism, you can break down natural consciousness by breaking down the physical structures that support such consciousness.
Before I finish I would also like to say something about philosophically defining miracles. Κέλσος is a blog where I also make arguments against the resurrection of Jesus, and counter apologetic attempts to prove miracles in the past. I summarize the historical reasons why I doubt the resurrection of Jesus and disagree with apologists who try to use ancient texts to prove miracles in the first part of my “History & Philosophy FAQ.” However, there is also a philosophical dimension to the question of how one should metaphysically define a “miracle.”
The Cambridge Introduction to the Philosophy of Religion (pg. 208) defines a “miracle” as follows:
“An event (ultimately) caused by God that cannot be accounted for by the natural powers of natural substances alone. Conceived of this way, miracles don’t violate the laws of nature but rather involve the occurrence of events which cannot be explained by the powers of nature alone. When dead bodies come back to life it is a miracle because the molecules that make up the corpse lack the powers necessary to generate life.”
I would add that miracles can also be caused by ‘g’ods like Apollo, and other supernatural agencies. However, I think that this definition of miracles fits in well with the distinction of the natural and the supernatural that I discussed above. Miracles involve irreducible agencies and wills, causally working from outside of the physical order, intervening in the physical order to cause occurrences that cannot be explained by causes within the physical order alone. There are also occurrences that result from causes solely within the physical order (in fact, they are the normal state of affairs, and thus non-miraculous); hence why the ocean can cause events like tidal waves, and I can catch an apple from a tree. But these causes within the physical order are incapable of producing the effect of the miracle. Hence why the molecules of Jesus’ corpse cannot cause him to immortally rise from death. Hence why the water molecules in a jar cannot explain sudden transformation into wine. Instead, an agency working from outside of the physical order (either God from outside of the universe, or Jesus within the universe, but still performing miracles through the power of God) is intervening to cause an occurrence that would be impossible within the physical order. This outside agency involves irreducibly mental cause and effect. It entails that mind comes first, and object second.
Sometimes apologists will also claim that miracles cannot be proven through science, and that miracles can only be demonstrated philosophically or historically, but nothing could be further from the truth. Science is above all an empirical method. Phenomena like Jesus rising from the dead or turning water into wine involve demonstrable, physical change that can be empirically observed. Hence why apologists appeal to the testimony of people who (allegedly) saw them, because they would be empirically observable if people could see them. Parapsychologists, who scientifically investigate paranormal phenomena regularly, could find them too. It just so happens that no such evidence has been found, and instead, everything that is often believed to be a miracle tends to have a natural (object first, mind second) explanation. For this reason, I argue that miracles, like Jesus rising from the dead, involve paranormal phenomena (defined by the Parapsychological Association as “any phenomenon that in one or more respects exceeds the limits of what is deemed physically possible according to current scientific assumptions”), in the same sense that UFO abductions and Sasquatch sightings are paranormal. The ‘paranormal’ is not synonymous with the ‘supernatural,’ and can involve both supernatural and natural phenomena. Miracles may be supernatural, and UFOs and Sasquatches may be natural, but both could be empirically observed, and yet no such reliable empirical evidence has been found.
I also argue in my essay “History and the Paranormal” that the historical method and ancient literary texts, in particular, tend to be unequipped for proving paranormal claims. This line of reasoning follows from historiographer C. Behan McCullagh’s (Justifying Historical Descriptions) discussion of the concept of “existing knowledge” and its relation to ad hoc assumptions. Ad hocness entails unproven (or untestable) assumptions that are being posited in order to defend a particular theory.
Ad hoc assumptions can also vary by scale, and some involve more unproven assumptions than others. If I were to posit the ad hoc assumption that the spear in John 19:34 actually missed Jesus and did not pierce any part of his body, in order to defend, let’s say the Swoon Theory of the resurrection (I, for the record, do not endorse this theory and lay out my own case against Jesus’ resurrection here), then this would only be a particular, but not a general ad hoc assumption. It is not outside of our “background knowledge” that spear thrusts can miss their target, even if we cannot test if this happened in John 19:34 (if the passage is historical at all).
But this is a very small ad hoc assumption compared to the amount of ad hocness that is involved in trying to prove a miracle like Jesus’ resurrection with ancient texts. This is because Jesus’ resurrection involves general assumptions about unproven phenomena, which are not even known to exist in our background knowledge, and not just a particular occurrence of a single event of such phenomena. It is not within our background knowledge (in parapsychology or medicine) that bodies have ever resurrected from brain death into immortal and imperishable bodies. The missed spear thrust only involves an ad hoc assumption about a particular event, otherwise belonging to general phenomena that is known to exist in our background knowledge, whereas a miracle like the resurrection involves general ad hoc assumptions about phenomena otherwise not know to exist in our background knowledge, before positing a particular event of such phenomena. For this reason, even the Swoon Theory (though it is far from the most probable alternative to the resurrection) still involves vastly less ad hocness than the Resurrection Hypothesis.
In my essay “History and the Paranormal” I point out that historians cannot make arguments with good probability that are too ad hoc. This ad hocness can be increased not only by the number of the ad hoc assumptions involved, but also by the scale of the ad hocness. I also discuss in my essay “History, Probability, and Miracles” how the resurrection of Jesus involves far too many unproven assumptions to ever be proven with the current state of evidence, which consists solely of ancient texts (which are far from our most reliable kind of evidence, compared to modern scientific methods, forensics, journalism, etc.).
It should also be noted that this reasoning would apply equally to natural paranormal phenomena. Natural paranormal things like UFO abductions, despite rumors of such occurrences, also tend to involve too many unproven assumptions to be argued for with good historical probability. In order to assume that a particular alien abduction had occurred, I would have to make the general ad hoc assumptions that aliens even exist, visit Earth, and occasionally abduct people. That is a way bigger ad hoc assumption than assuming that a particular person who reports a UFO abduction might be lying or mistaken (which is known to occur within our background knowledge).
Such reasoning shows that doubting Jesus’ resurrection has nothing to do with a special bias against the supernatural. The same reasoning applies to purely natural paranormal claims like UFO abductions and Sasquatch sightings. Neither can be said with good historical probability, because history cannot be that ad hoc, especially when ancient texts are the only evidence that we have to consider. This provides purely historical grounds for doubting Jesus’ resurrection (or, at least, doubting that one can “prove” the resurrection with ancient texts), which, despite all of the discussion of the natural vs. the supernatural above, does not require the assumption of naturalism at all.
 Kaminski (pp. 3-4) explains that agent over-detection need not be the “sole” cause for all of the complexities of religious practice and belief, and also identifies social systems and cultural adaptations as major causes as well. The “cognitive byproduct account of supernatural beliefs,” Kaminski explains:
“Is probably the most widespread at this time and seeks to explain these phenomena in terms of biases produced by the idiosyncrasies of the human cognitive system … For example, humans appear to have a tendency to be overly sensitive to cues of the presence of other agents in their vicinity (Guthrie 1993). Thus, it is a very common occurrence that someone returning home late at night imagines the presence of shadowy figures where there are none. This oversensitivity is presumably highly adaptive given that the cost of reacting to a non-existent threat is much lower than that of failing to spot a threat that is real (Haselton and Nettle 2006). It has been argued, however, that such instances of imagining the presence of nonexistent agents may lead to the postulation of the presence of agents whose supernatural abilities allow them to, for example, disappear when more closely investigated (Barrett 2000).”
In terms of explaining all forms of religious practice and belief, however, Kaminski explains that the cognitive byproduct account is best paired with “dual inheritance accounts” that combine other theories:
“Originally put forward in the context of discussing religious beliefs, the cognitive byproduct account is coming to be seen as inadequate when dealing with the complexities of religious traditions, leading to the proposal of dual inheritance accounts that combine it with approaches that treat religions as prosocial cultural adaptations (Talmont-Kaminski 2009b).”
However, in terms of explaining religion’s particular tendency to project supernatural persons, wills, and agencies (which is the focus this essay regarding its role in producing belief in both a monotheistic ‘G’od and polytheistic ‘g’ods), Kaminski explains:
“The cognitive byproduct account is much more successful, however, when it comes to such beliefs as superstitions and, indeed, pseudoscientific explanations … [since] supernatural beliefs usually give agency a much more fundamental role in the functioning of the universe than is the case with scientific explanations.”
 Although I support a naturalist version of atheism, this need not imply that all atheists are naturalists, or that the concept of atheism and naturalism are inseparable. Philosopher Stephen Law has cautioned against defining atheism as requiring naturalism in his article “Secular Humanism: DON’T Define It as Requiring Naturalism,” and I agree. Law points to a PhilPapers survey that finds that 35% of philosophers who identify as atheist do not identify as naturalists. These atheists can hold different views about naturalism than I, and I would still consider them to be atheists.
 Sometimes it is argued that nature is intentional in the sense of Aristotelian teleology. However, the sort of intentionally that I am referring to is Platonic teleology. The Platonic sense of teleology is more akin to Paley’s teleological argument for God, which maintains that the universe reflects a willful process of design that points to an intelligent creator. The Aristotelian sense of teleology pertains more to substance being directed toward certain ends, which can be formulated as “having the potentiality to change in a predictable way or to move towards a predictable goal.”
As professional philosopher André Ariew in “Platonic and Aristotelian Roots of Teleological Arguments” (pg. 8) explains:
“Insofar as Aristotle’s teleology pertains to explanations of natural items, it is misleading to cast off Aristotle’s teleology as reading purposive behavior into natural events. This perception of Aristotle’s teleology is the result of conflating Aristotle’s naturalistic teleology with Plato’s … Plato’s natural teleology is and Aristotle’s is not creationist, anthropomorphic, and externally evaluative … Aristotle’s natural teleology is and Plato’s is not naturalistic, immanent, and functional.”
Ariew (pgs. 8-9) goes on to identify two distinct types of teleology in Aristotle’s writings:
“Teleological explanation in Aristotle pertains broadly to goal-directed actions or behavior. Aristotle invokes teleology when an event or action pertains to goals … [W]e can distinguish two distinct conceptions of teleology in Aristotle’s writings and at least two sub-categories:
- Agency-centered teleology:
i. Behavioral. Activities undertaken for the sake of something, which may be either a state or further action.
ii. Artifactual. Activities undertaken for the sake of producing an object of a certain sort (artificial).
- Teleology pertaining to natural organisms:
i. Formal. Biological developmental processes that occur for the sake of self-preservation or preservation of the species (form).
ii. Functional. Parts of organisms that are present for the sake of the organism possessing them.
I and II are distinct notions of teleology … Agent-specific teleology (I) is purposive, rational, and intentional, and represents external evaluation. The goal is the object of an agent’s desire or choice … Teleology pertaining to natural organisms is distinct: non-purposive (though seemingly so), non-rational, non-intentional, and immanent — that is, an inner principle of change. The goal is not an object of any agent’s desire.”
The present essay maintains that agency-specific teleology (I) does not exist at the irreducible, primitive level in naturalism (there is no Platonic teleology that is the source of existence and being, or upon which everything is contingent), but does not argue that naturalism necessarily excludes Aristotle’s teleology pertaining to natural organisms (II).