Can the
universe account for its own existence? Can we find, within physics and cosmology,
the reason for why physical reality exists at all? Cosmologists and physicists are
hopeful that finding an answer to these questions is at least possible and
maybe even plausible. For the cosmologist’s job is to search out the origin of
the universe—or find out if it had an origin at all—to find out why it exists
in the first place, and why and how it came to exist in its current state. Now
cosmology has come a long way in the last century and it continues to advance
in leaps and bounds. But despite the advancements of physics, I maintain that
physicists will never in principle be able to explain the existence of physical
reality.
I
realize that in promulgation of this statement I am shouldering a great burden
of proof, and that such a statement can even come across as arrogant. However,
please note that it is borne out of careful logical study of the philosophy of
science, and not from a petulant view of science or scientists. In fact, I have
found that it is “skeptics” who arrogantly fail to recognize the explanatory
limits of science, and by doing so would only take my aforementioned statement
as arrogant because their vision is dogmatically colored by the lens of positivism.
However, since this is not the time to get into the hypocritical creeds of the
freethought community, let us return to the thesis at hand: science cannot
explain why the universe exists. (Note that by “universe” I include any
possible meta-universe or multiverse.)
Now,
what gives me the right to assert such a blanket statement like this? Well, the nature of scientific inquiry itself
does. You see, as I’ve pointed out before, science operates on inductive
conditional statements like “if p, then q”. This is why scientists can run an
experiment a finite amount of times and then generalize a conditional statement
as a law. (Note again that such an exercise would be moot unless we took things
to have shared essences.) And this takes us to the nature of scientific laws
themselves. Scientific laws are mere descriptions of the way things tend to
behave given certain ideal conditions. These laws are not prescriptive, in that
they don’t inform substances on how
to behave. Rather, substances behave the way they do and our formulated laws
are informed by such behavior.
The
pivotal point here is that scientific laws are ontologically dependent on
existence, not the other way around. That is to say, scientific laws don’t
obtain unless you first have something which actually exists and behaves in
some way. That’s why the conditional statements of scientific law start with
“if p,” meaning “if some state of actual affairs obtains in reality”. Now, what exactly does this have to do with
science explaining the existence of the universe? Well, if existence logically
precedes scientific law, then the latter cannot itself ever explain the former.
That is to say, scientific law first needs something
already in existence to describe the behavior of—it doesn’t describe
non-existence—therefore science is reliant upon existence, and thus existence
will always be a higher member in an explanatory chain. But in order for science to explain the
universe it would itself need to be the higher member in an explanatory chain,
and since this is logically impossible then it follows necessarily that science
cannot in principle explain the existence of the universe.
There’s
another point to be made here, however. It should also be noted that science
cannot even account for its own laws. That is, science itself cannot determine
why the laws are the way they are as opposed to being another way. Here’s why.
Either (i) the reason scientific laws are the way they are is to be illumined
by another scientific law, or (ii) the reason scientific laws are the way they
are is to be illumined by an explanation not
susceptible to scientific description. (i) is not a viable option because
explaining scientific law by another scientific law just pushes the question
back a step and doesn’t answer anything. Moreover, the question was to explain
the set of scientific laws, and this
cannot be done by another scientific law not in the set since the set already
contains all scientific laws. Thus, option (i) isn’t even possible. (This is
why arriving at a scientific Theory of Everything is not possible as well.) If
one chooses (ii) then we arrive at an explanation not susceptible to science,
which only proves my point, namely, that scientific law cannot explain itself.
Implications for naturalism
Now all
these points actually have important implications for naturalism as well. For most
ontological naturalists naturalism seems to imply physicalism—note that I’m not
claiming that naturalism necessarily entails physicalism, only that most
naturalists are physicalists. The reason for this is that if all that exists is
the natural world and the natural world contains all matter, energy, space and
time, then all that exists in the natural world is physical—or it at least
supervenes on the physical—and therefore all that exists is physical.
But this
means that physics itself should be able, in principle, to arrive at a theory
of everything and thereby explain the existence of the physical world. But we’ve
just seen above that this is what physics and science cannot, in principle, do.
And thus physicalism and naturalism are false—again, based on those who would
derive physicalism from naturalism. David Bentley Hart articulates the point
numerous times in The Experience of God:
Physical reality cannot account for its own existence for the simple reason that nature—the physical—is that which by definition already exists; existence, even taken as a simple brute fact to which no metaphysical theory is attached, lies logically beyond the system of causes that nature comprises; it is, quite literally, “hyperphysical,” or, shifting into Latin, super naturam. This means not only that at some point nature requires or admits of a supernatural explanation (which it does), but also that at no point is anything purely, self-sufficiently natural in the first place. (p. 96)
To drive
the point home one last time, physics and science are at a loss to explain
exactly why the physical world is the way it is, and why it exists in the first
place. Science is explanatorily inert here. And this should not be the case if physicalism were true.
Thus, because of the nature of the universe and the explanatory limits of
physics, physicalism is false. What implications should this entail for
naturalism? I’ll let the reader decide for themselves.