Somehow I missed this
post by Sasha Volokh on the usefulness of biographies of old
philosophers, and also why it might be still be important to read old
philosophers.
As to the biography question, certainly one of the emphases of
modern continental philosophy (derrida et al) is the deconstruction of
an argument based on the speaker's biases, which would mean that
biographical information is of great importance in properly
understanding his work. And if such a biography concerns itself
primarily with the factual details of the life of its subject, then
that may well be the limit of its usefulness. However, a
philosophical history as opposed to a personal
history of that philosopher is another matter entirely. By
relating the twists and turns of his philosophical development, it is
possible to discern where his philosophy took a wrong turn, where the
mistakes came in. For it is sure that as in science, all philosophy
is only an approximation of the truth.
Like historical interpretation, and quite unlike the sciences,
philosophy suffers from the problem of verifiability (or more properly
falsifiability). Since philosophical theories can never be critically
tested it is difficult to know which is more true, except insofar as
a theory may suffer from some internal contradiction. However, it is
reasonable to expect that the newer philosophy would be more
far-reaching in its implications, more consistent, and certainly
guided by the learning acquired by its close sibling, science.
It is true that there is a historical value to reading old
philosophers. Since they tended to be problem-oriented (or at least
saw themselves as tackling pressing problems), we may gain additional
insight into the historical era in which they wrote by both the
problems they were attempting to solve, as well as the way they
attempted to solve it. The insights which they developed in turn
frequently had an impact on the more conventional aspects of history
-- certainly no discussion of the 19th and 20th centuries would be
complete without a discussion of Marx, even though his social
"science" has been completely discredited. Similarly for Hegel,
Rousseau, Mill, Bacon, Augustine, Aurelius, and Plato. But as modern
philosophy as increasingly turned its attention away from real-world
problems to the pseudo-problems of criticising and analysing the
criticism and analysis of their peers and professional competitors, it
has rendered itself increasingly irrelevant to the rest of the world,
Modern philosophy has been afflicted by its own professionalization
and institutionalization within the modern university. Once
philosophy was enshrined as a profession (i.e. as a job) in itself (a)
it became a tool for the acquisition and maintenance of power, and (b)
it suffered from the petty bickering that afflicts mediocre minds in a
university setting.
Point (a) is exemplified by the pseudo-philosophy of Hegel, which
was directed and promulgated by the newly-unified German state under
the Kaisers. In exchange for his position as official chairman of all
philosophy departments within Germany, Hegel developed the philosophy
of nationalistic dialectic as justification for Germany's monarchial
system as the perfect, ultimate expression of political governance,
and prophesied the coming inevitable dominance of the German state as
justification for it's aggressive military and foreign policy. Coming
on the heels as it did of Kant's brilliant Critique of Pure
Reason and a resurgent German philosophical school, the
state-sponsorship of this philosophy and the state-control of the
universities quickly made Hegel's philosophy the only one inside
Germany. Unaware of these developments, the outside world of
philosophy was induced to take Hegel seriously by the complete
dominance of Hegel's philosophies within Germany's respected
philosophical circles, as well as its false claim to be the logical
extension and successor to Kant's groundbreaking work. Schopenhauer,
who had actually developed a logically valid and consistent extension
of Kant, was completely suppressed within Germany and kept hidden from
the rest of the world, completing the illusion of German philosophy's
wholesale belief in the validity of Hegel's doctrines, and certainly
Schopenhauer's compelling analysis of Hegel as babbling nonsense
disguised by impressive-sounding language and verbiage would have
completely undermined the seemingly authoritative philosophical
justification that the German state needed from Hegel and its state
philosophers.
Point (b) can be derived from the apparent fact that good
philosophy is hard, indeed it seems that there are only a few
people each century capable of the level of thought necessary to
produce a lasting mark in philosophy. The professionalization of
philosophy, therefore, simply guarantees that most "philosophers" are
in fact unqualified by reason of intellect or aptitude for the task,
yet required in order to keep their job, much more to advance
professionally and obtain a measure of peer respect, to do something,
anything, that looks sufficiently like real philosophy.
Hegel's philosophically embarrassing policy of sucking up to the
German monarchy, selling his mind and reason to the service of the
state is therefore more understandable as a means for a mediocre yet
ambitious thinker to obtain influence and power over his peers, and
power over the people as a whole. More understandable, perhaps, but
not more respectable. Whereas Plato in his Republic deemed
philosophy the master of the state (with himself in charge, of course,
as Popper's masterful analysis in The Open Society and Its
Enemies observes), Hegel found more profit in reversing this,
making the state the master of philosophy. In this he was more
successful, for where Plato failed, Hegel succeeded.
In more recent years, especially in the 20th Century, the study of
philosophy has rapidly deteriorated as professional philosophers have
abandoned any attempt to solve real problems. The complete barrennes
of Hegel's philosophies led them to conclude that philosophy itself is
worthless, resorting in response to such futile and empty pursuits as
logical criticism and linguistic criticism (both useful in their own
right as means, but absolutely worthless as ends),
and irrational mysticism and oracular prophecies. These
pseudo-philosophers, following Hegel's example, conceal their lack of
content with impressive words, obscure language, and oracular
declarations, and defend the resulting emptiness with a rejection of
rationality and reason. Their Hegelian embrace of internal
contradictions results in their untestability as well as their lack of
information content (In Conjectures and Refutations, Popper
gives multiple proofs that a theory which contains internal
contradictions can be used to prove anything at all, as well as a
proof that the information content of a statement or theory is
inversely proportional to its probability).
Which is not to say that there is not good modern philosophy out
there. Popper in particular has helped revolutionize the natural,
physical, and political sciences with his theories of falsifiability,
and his compelling arguments against utopianism and historicism. In
the process, he has provided a rational framework for political and
social advancement, as well as a demarcation between scientific and
non-scientific pursuits, and provided a well-reasoned and
comprehensive attack on Hegelian/Marxian dialectical historicism.
Karl Popper in fact provides a good counterexample to current
trends in philosophy, to the lack of practical problem-oriented though
that has characterized the general deterioration in philosophy since
Kant. Both Kant and Popper were inspired by real problems, by
revolutions in science that challenged the foundations of philosophy
and the nature of knowledge and science.
Kant seems to have been attempting to explain how it was that
Newton could have discovered the physical laws that bear his name,
given that Hume had previously shown that the process of induction
(the only technique known for discovering general laws from discrete
observations) was logically invalid -- it contained a fatal
contradiction. The question Kant attempted to answer was "How then,
without induction, did Newton discover his laws". His answer was
essentially that Newton imposed his laws on nature, although his
argument, and its conclusion is not as coarse as this statement
implies.
Popper took up Kant's problem on the occasion of the overthrow of
Newton's laws by Einstein's Relativity. Initially, his question was
somewhat different, essentially "What is the difference between
science and metaphysics", or more specifically in his case, what was
the distinction between the science of Newton, Einstein, etc, and the
so-called sciences of Marx, Adler, and Freud. The fundamental
difference between the two branches of study turned out to be that of
"falsifiability", which is to say that science is characterized by
theories that can be proven false by observation and experiment, while
non-science (metaphysics) theories cannot be proven false by
observation (metaphysics can be proven false by contradiction,
although Hegel attempted to remove even this constraint by embracing
contradiction as an essential component of his dialectic).
Popper's realization also showed where Kant went wrong: Kant
assumed along with everyone else in his day that Newton was right,
that he really had discovered Truth-with-a-capital-T, despite all
rational, logical argument that the only means humans possessed to
advance knowledge (induction) was invalid for such purposes. The
falsification of Newton's "laws" in favor of Einstein's theories by
the famous eclipse experiments showed that Kant's analysis of Newton
as a successful imposition of order by force of reason was flawed.
In its place Popper proposed that induction is unnecessary for the
advancement of knowledge, and that since it is impossible for us to
discover true laws in nature, the induction "problem" vanishes anyway.
As an alternative to induction, Popper proposed that knowledge
advances as humans invent through the application of their creativity,
explanations for the phenomena they observe. These explanations, or
theories, are then tested not for confirmation (which is easy and
meaningless), but for falsification -- the theories are tested by
attempting to prove them wrong. Only after a theory has survived many
such attempts at falsification do we begin to lean on it as a basis
for further theories, and it is shown false by observation it is
discarded in favor of a better explanation, i.e. one that is capable
of surviving yet more stringent attempts proving it false. This
theory of human learning neatly avoids the problem of induction (no
series of discrete observations can prove the validity of a general
law). In addition, it provides a philosophical explanation for the
scientific method, as well as a neat demarcation of scientific
enquiry.
This theory has other implications in non-scientific areas as well,
including economics, politics, and history, all of which Popper
explored in his huge body of work. Among other things it provides a
rational definition of democracy which avoids the democracy paradox,
and an explanation for why democracy and capitalism are more rational
and efficient than totalitarianism and socialism.
So I guess the answer to the original question is simply this: Most
new philosophers aren't worth reading, and many of the old
philosophers haven't yet been superceded. And given the rate of
philosophical advance (1-2 great works per century), this is indeed to
be expected.