scientism

noun

1. (countable, uncountable)The belief that the scientific method and the assumptions and research methods of the physical sciences are applicable to all other disciplines (such as the humanities and social sciences), or that those other disciplines are not as valuable.

   “Finally, with good reason, this psychology aims to be a psychology of a purely empiriological type. It is pervaded and overwhelmed on every side, however, by a pseudometaphysics of the most vulgar character, which Freud is all the less anxious to dispense with as he imagines he has no philosophy or metaphysics at all. I say pseudometaphysics of the most vulgar type, because it combines all the prejudices of deterministic, mechanistic scientism with all the prejudices of irrationalism.”

   “This claim, espoused by scientific naturalists, is called scientism, the view that science is the paradigm of truth and rationality. There are two forms of scientism: strong and weak. Strong scientism […]”

   “This is the view of scientism. The historical roots of scientism can probably be traced to the Enlightenment with its ideology of progress and perfectibility. Perhaps its best-known historical advocate is the French social philosopher Auguste […]”

   “Habermas's work of the middle and late 1960s is centrally concerned with the philosophical and sociological issues raised by scientism, the reduction of all knowledge to that furnished by the empirical sciences, where these are conceived as […]”

   “'Scientism means ... that we no longer understand science as one form of possible knowledge, but rather identify knowledge with science.' Habermas's critique of scientism focuses on its relation to positivism, since positivism provides […]”

2. (countable, uncountable)The belief that all truth is exclusively discovered through science.
3. (countable, rare, uncountable)A pseudoscience.

   “The line is straight out of eugenics, the deeply dishonest scientism that in the early 20th century convinced many people that criminality, poverty and a host of other ills were all inherited.”