One who makes or supports progress; a progressionist.(noun)
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Use "progressist" in a sentence
"This is true darwinism, and the source of the many progressist notions that darwin repeatedly came up with."
"Darwin just slapped a progressist notion of natural selection onto it to explain the “perfection of adaptation” problem, diectky inspired in the theories of the economists that fathered capitalism."
"In the parish of Briarfield, with which we have at present to do, Hollow's Mill was the place held most abominable; Gérard Moore, in his double character of semi - foreigner and thorough going progressist, the man most abominated."