Sentence:  "The Weekly Standard" ran an interminable series of essays lauding manliness and lamenting its demise at the hands of liberalism. Perhaps the <WSD>Ur-text</WSD> of this movement was a 2003 Jay Nordlinger op-ed in "The Wall Street Journal". 
Meaning of the word marked with <WSD> tags:  A primitive, seminal, or prototypical example of an artistic genre or the basis of an ideological movement.