Why Do Philosophers Never Seem To Make Progress?

“Philosophy falls somewhere between the arts and sciences. On the one hand, it offers idiosyncratic worldviews that may be too disparate to compare: Hume and Husserl, for example, or Spinoza and Sartre. It is not surprising, then, that the question “Is philosophy progressive?” is hardly ever raised. On the other hand, philosophy, like science, is a quest for truth, and it too requires that we check our theories against what we observe in the external world, or the internal one (sense data, pains, etc.).”