In
academic circles it is commonly assumed that consciousness is
generated by the brain. But some philosophers have been dissatisfied
with this idea. Why is it that some particular arrangement of matter
would cause Mind (a totally different type of thing) to emerge from
that matter? To many that seems no more plausible than the idea that
some particular arrangement of crystals in a rock might cause the
rock to gush out blood.
One
alternate idea is to assume that we have something like a soul, and
that our mental experiences are produced not just by matter (the
brain), but something that is itself spiritual. Another alternate
idea is the radical notion known as panpsychism. Panpsychism is
basically the idea that consciousness is in everything.
A
panpsychist might believe that every piece of matter is in some sense
conscious. At first this may seem to help in explaining how brains
can produce consciousness. If every neuron is a little bit conscious,
it might explain why billions of cells in the brain can produce
consciousness.
But
it does not seem that there is any evidence that little pieces of
matter are conscious. Electrons seem to behave with complete
predictability according to the laws of electromagnetism, not as if
they were semi-conscious little things with wills of their own. And
oxygen molecules do not act as if they had some interest in their
surroundings. When you enter an empty room, you do not feel a gush of
wind coming your way, as you might feel if the air molecules were
interested in seeing who was entering the room.
Panpsychism
seems rather inconsistent with theism. Consider the moon. The idea
that the moon is conscious may have a certain appeal. But imagine all
those rocks on the moon's surface, lying there for billions of years.
Think of what torture it would be if such rocks were actually
conscious – they would have to suffer billions of years of absolute
boredom, just sitting there with nothing to observe or experience. It
would be hard to think of a reason why any deity would wish to endow
such rocks with consciousness, to suffer such billion-year boredom
and stagnation. And what about all the rocks and little pieces of
matter underneath the surface of the moon and other planets, who
would have the dullest experiences imaginable for billions of years?
I'm
not sure we would want to believe that all the little pieces of
matter around us are conscious. Do you want to believe that every
time you walk on the autumn leaves, that you are crushing conscious
beings underneath your foot? And if you accepted panpsychism, it
would seem that every time you bake some cookies, you would have to
worry about slowly torturing the poor conscious little cookies.
An
alternative to panpsychism, and something equally as radical, is the
philosophical doctrine of idealism. Rather than maintaining that
consciousness is in everything, an idealist maintains that everything
is in consciousness.
An
idealist maintains that the only thing that exists are different
types of minds, and that material things only exist in the sense that
they are elements within the mental experiences of minds. Perhaps
the best way to explain this idea to the modern person is to consider
what goes on in a video game. Suppose you are playing some Star Wars
video game in which you are trying to blow up the Death Star. Now to
what extent does this Death Star exist? It has no physical existence
outside of the game world. The Death Star exists as a shared
perception, something that is seen by all of the players of the video
game under certain conditions. Similarly, an idealist may believe
that Earth's moon has no physical existence outside of minds.
According to such a person, our moon only exists as a shared
perception within the mental experience of humans. An idealist thinks
that if somehow all minds were to be destroyed, there would be no
more moon.
So
the idealist believes that the sole reality of physical things we
perceive is their reality inside our minds. To such a person, the
history of the universe is simply a history of mental experiences;
and there was no state of the universe in which matter existed before
minds.
There
is no way to prove this philosophical doctrine, but there are no
observations that we could ever have that would disprove this idea.
Think about it. Every single observation or
measurement we can make can be boiled down to a human experience. If you
see a rock, that's a human experience. If you weigh the rock, that's
also a human experience. If you measure the rock with a measuring
rod, or determine its chemical content using a mass spectrometer,
that's also a human experience. There is no way to verify that the rock
exists outside of human experience.
Any
credible theory of idealism requires a belief in some higher agent
that acts to assure that there are certain consistencies in human
experiences. But since idealism ends up removing quite a few
dilemmas and difficulties in the “first matter, then mind” story
of the universe, idealism ends up being at least as credible as any
other philosophical worldview. A surprisingly compelling case for
idealism was made in the 18th century by the British
philosopher George Berkeley.
Today
idealism is rather unfashionable, but in certain circles it is
fashionable to speculate that we are just items in some computer
simulation created by extraterrestrials. But the underlying concept
is quite similar – that the things we perceive do not exist
independently of our experiences, and that there is some external
reality guaranteeing that we have certain common perceptions (such as
the perception of the moon when we look up at night), rather than
each of us having totally unique mental experiences.
But
if you maintain that we are participants in some computer simulation
crafted by extraterrestrials, you haven't removed any explanatory
difficulties. The vexing problem is how is it that Mind can arise
from matter, a totally different type of thing. With idealism such as
advanced by Berkeley, that problem is removed, for you end up with
the doctrine that there are only minds. But with some
extraterrestrial simulation theory, the explanatory problem becomes
twice as bad. For the theory maintains that biological matter gave
rise to one type of minds (extraterrestrial minds), and that such
minds then produced electronic matter that give rise to our minds.
With that theory, you have two types of “Mind from matter”
difficulties.
Both
panpsychism and idealism are rather radical philosophical doctrines,
and we are not forced to choose between the two. But if I had to
choose between the belief that consciousness is in everything
(panpsychism), and the belief that everything is in consciousness
(idealism), I would choose the second of these. I don't care to
believe that my cookies are suffering when I bake them.