Standard theory of particle physics |
We have now two great physical theories:
·
On
one side, quantum mechanics, which applies
primarily to very small objects (those scarcely affected by gravity), and is
the basic tool for the standard theory of particle physics.
·
On
the other, general relativity, which
applies to very large objects (from the planets to the whole universe, those
for which almost nothing matters except gravity), and is the main tool for the
standard cosmological (Big Bang) theory.
Unfortunately, the two theories are not
mutually compatible, so that physics is far from having resolved its outstanding
issues. Moreover, these two theories depend on about forty independent
variables. Many physicists think that they are too many. If it were true, it
would mean that the configuration space of nature has about forty dimensions.
If it is difficult to imagine a four-dimensional space, what about forty!
Man has an irresistible tendency to assume that
nature must be very simple. The resistance of physicists to accept forty
independent variables is thus quite understandable. Many of them hope that, as
science progresses and new things are discovered, the number of those variables
will decrease. A few think that in the end their number will be reduced to
zero. That would mean that we live in the only possible universe. All those multiverse
theories out there (six at least, incompatible with one another) would disappear
automatically. But this hypothesis is far from confirmed.
In the worst case, many physicists would be
happy if the number of independent variables could be reduced to one. In that
case there could be a very large number, perhaps infinite, of universes, but a hypothetical
Creator would have needed just a single joystick moving, for instance, from
right to left (or from left to right), to choose which of the possible
universes He wanted to create.
This tendency towards simplification applies to
all fields of human research. Consider, for example, history, the study of
human activities over time. In the last two centuries there have been numerous
attempts to explain the course of history in relation to a single independent
variable. Let us look at a few of them:
·
Karl
Marx, one of the most influential men in recent times, based his theory
(dialectical materialism) on the assumption that history can be explained
perfectly in terms of a single independent variable: economy. He not only
explained history, he also predicted (wrongly) its future development.
·
For
Max Weber, who published his main work in the early twentieth century, the only
independent variable is religion. The differences between Protestantism and Catholicism
would explain the economic development of the West during the last five
centuries.
·
For
the Fabian Society, among whose main representatives were the writers H.G. Wells
and George Bernard Shaw, and who based themselves directly or indirectly on Darwin’s
theory of evolution and the philosophies of Spencer and Nietzsche, human
history depends only on natural selection, that would lead inexorably from
animal to man, and from man to the superman. A branch of this set of theories
led to the doctrine of the supremacy of the Aryan race, that dominated in
Germany during Hitler’s government. A more recent form of these ideas is transhumanism
(or humanism+), led by Nick Bostrom, the Oxford philosopher.
·
For
Isaac Asimov, whom I have mentioned several times in these posts, the only
independent variable needed to explain human history is technology. In a series
of 14 volumes he attempted to explain history in the light of the progressive technological
advances that came to happen.
George Bernard Shaw |
Clearly, all these theories cannot be true at
the same time, for they contradict one another. Also there is a much more
important question: why should nature, or history, or whatever, be explained by
a single independent variable? In math we are used to working with functions of
many variables. It is true that the greater the number of these, the more
difficult to represent them. But I do not see why we should strive to deny the
existence of such variables. If we had accepted that the world is more
complicated than we would like, perhaps he might have avoided some of the
suffering in the twentieth century.
Manuel Alfonseca
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