Ludwig Wittgenstein was born in Vienna in 1889 and died in Cambridge in 1951. He studied engineering, first in Berlin and then in Manchester, and he soon began to ask himself philosophical questions about the foundations of mathematics. What are numbers? What sort of truth does a mathematical equation possess? What is the force of proof in pure mathematics? In order to find the answers to such questions, he went to Cambridge in 1911 to work with Russell, who had just (...) produced in collaboration with Whitehead (1861-1947) Principia Mathematica (1910-1913), a monumental treatise which bases mathematics on logic. But on what is logic based? Wittgenstein's attempt to answer this question convinced Russell that he was a genius. During the 1914-8 war he served in the Austrian army and in spare moments continued the work on the foundations of logic which he had begun in 1912. His war-time journal, Notebook s 1914-16 (1961), reveals the development of his ideas more clearly that the final version, Tractatus Logico- Philosophicus, which he published in the early 1920s. (shrink)

I have long felt that graduate education in philosophy, when successful, produces in its beneficiaries a strong antipathy, almost an allergic reaction, to “ism” words. “Naturalism,” nevertheless, is not one that is easy to eschew. This is not because of anything like a widely shared or especially intuitive doctrine associated with the term. The numerous doctrines offered by way of characterization often seem either suspicious because of their strength, or else platitudinous, too easy and not sufficiently restrictive. The appeal of (...) naturalism is rather a matter of a tendency of thought, a powerful one despite its lack of easy definition. (shrink)

There are several kinds of philosophical naturalism and one of their leading ideas is that the right method in philosophy is not to theorize about things but to describe them as we find them in daily life. Wittgenstein’s later philosophy is evidently a naturalism inspired by this idea. However, that is an observation which leaves much unexplained. It is a simple key which unlocks the first door only to reveal others behind it that remain closed.