Original sentence: The contemporary pejorative usage of the term emerged from conservative criticism of the New Left in the late 20th century
Edited sentence: While the original definition of the term referred to the strict adherence to political party orthodoxy demanded by 20th century dictatorships of its constituents, to the blatant disregard of objective or scientific facts, the contemporary pejorative usage of the term emerged from conservative criticism of the New Left in the late 20th century