Retrieving the Point of the Realism-Instrumentalism Debate: Mach vs. Planck on Science Education Policy

I aim to recover some of the original cultural significance that was attached to the realism-instrumentalism debate (RID) when it was hotly contested by professional scientists in the decades before World War I. Focusing on the highly visible Mach-Planck exchange of 1908-13, I show that arguments about the nature of scientific progress were used to justify alternative visions of science education. Among the many issues revealed in the exchange are realist worries that instrumentalism would subserve science entirely to human interests, as well as instrumentalist worries that realism could become the basis of a science-based religion. I conclude by addressing some issues relating to RID that are now occluded because of Planck's triumph over Mach.