Though John Dewey coined the term ‘instrumentalism’ to describe an extremely broad pragmatist attitude towards ideas or concepts in general, the distinctive application of that label within the philosophy of science is to positions that regard scientific theories not as literal and/or accurate descriptions of the natural world, but instead as mere tools or ‘instruments’ for making empirical predictions and achieving other practical ends. This general instrumentalist thesis has, however, historically been associated with a wide variety of motivations, arguments, and (...) further commitments, most centrally concerning the semantic and/or epistemic status of theoretical discourse (see below). Unifying all these positions is the insistence that one can and should make full pragmatic use of scientific theories either without believing the claims they seem to make about nature (or some parts thereof) or without regarding them as actually making such claims in the first place. This entry will leave aside the question of whether the term ‘instrumentalism’ is properly restricted to only some subset of such views, seeking instead to illustrate the historical and conceptual relations they bear to one another and to related positions in the philosophy of science. (shrink)