Since LessWrong is a major congregation point for certain philosophical ideas, and because people here tend to be more objective (in the sense of not being self-deluded) than elsewhere, I thought I'd ask people's views.
To be clear, by "Greatest Philosopher" I am referring not to the most correct philosopher in human history but the one who deserves the most credit for advancing human philosophy towards being more true.
Off the top of my head I would say that a prime candidate would be Hume- amongst other things he rejected the idea of a soul, realised to a much greater extent than his predecessors the limits of human knowledge, and opposed the idea that reason is somehow an objective force that can make priorities independent of emotions.
Aristotle deserves considerable credit relative for his time but doesn't make the list because although it wasn't his fault his ideas were dogmatically accepted and held back both science and philosophy later on.
Your thoughts?
If you mean that philosophers should find answers to philosophical questions, thus (in theory) ultimately leading to no more need for philosophical speculation, in terms of what would be best, I agree. However, teaching things of a philosophical nature would still be necessary even in such an ideal world in order to improve thought.
If you mean that philosophy should ultimately be transformed into other fields, I will say that in some areas I'm not sure but there are areas where this isn't really possible- making the refutation of the skeptic a non-philosophical question, for example, is impossible. Another example would be ethics in a prescriptivist sense, or the problem of personal identity. There are ways of solving these, but there is no way to make them non-philosophical.