People often wonder why there appears to be no progress in philosophy, unlike in natural science, and why it is that after some three millenniums of philosophical activity no dramatic changes seem to have been made to the questions philosophers ask. The reason is because people keep asking the same questions and perplexed by the same difficulties. Wittgenstein puts the point rather directly: “Philosophy hasn’t made any progress? If somebody scratches the spot where he has an itch, do we have to see some progress?” Philosophy scratches at the various itches we have, not in order that we might find some cure for what ails us, but in order to scratch in the right place and begin to understand why we engage in such apparently irritating activity. Philosophy is not Neosporin. It is not some healing balm. It is an irritant, which is why Socrates described himself as a gadfly.