Perhaps the pertinent source is Antonio Gramsci's "Long march through the institutions." Gramsci's road to communism was capturing the culture, and it is certainly more destructive and enduring than any armed revolutionary uprising.
But if we have lost that fight for the soul of western civilization, it does not mean that the truth is dead or that the war is over. Much remains to remind intelligent young people that they need not be slaves to the dreary culture of the Left. Indeed, I would not say that the Left has captured any "high ground" at all: only the intellectual fever swamps, nourished by a mountain of tax dollars.
I literally had to teach the teacher that HDT wrote more than 'Walden Pond'.
Later that year, I was asked to teach the teachers how to diagram a sentence.
Higher education... isn't.
And because I never studied Greek, my grandfather considered me illiterate. Even with Hebrew and Latin and English and french.
I wish I had an education from 1840.
/john