Sentence:  "Progressives are wrong to <WSD>hypostatize</WSD> their belief in mankind's eternal advance, and to disavow anything that does not fit this preordained vision." 
Meaning of the word marked with <WSD> tags:  To make into, or regard as, a separate and distinct substance; to construe a contextually-subjective and complex abstraction, idea, or concept as a universal object without regard to nuance or change in character.