In 1979, I was over 300 pounds, a daily pot smoker, and about to piss away my opportunity to graduate with my college class by blowing off two courses in my last semester. Joan Gussow was already preaching a gospel of healthy, sustainable food that I would have ignored had I known about it at the time. Somehow, it makes me more appreciative of it now.
I could quote practically every sentence, but will paraphrase only a couple of points and hope you'll react as I did and want to devour the whole thing.
Even in 1979, the availability of food products had exploded over the previous 50 years, from 800 to more than 10,000. (I failed to find an equivalent contemporary number, but note that foodprocessing.com did report the introduction of more than 3 dozen products this month.) Very few of the new products are, say, newly developed veggies; generally, they're progressively more processed crap that nutritionists would advise against consuming.
With so many new products, nutritionists are in the position of advising people to remove things from their diets, as compared to an earlier time when they were advising the additions of, say, milk and green leafy vegetables. Asking people to do without is "battling against a well-financed thrust toward self-indulgence," Gussow wrote.
Gussow bares the absurdity of "nutrition education" by saying that it is what Big Food wants from nutritionists, because it knows that that sort of quantifying won't change behavior. Nor has it, of course — we still equate food with what Michael Pollan calls "food-like substances."
And so on. Please, go read the whole thing, to understand how little has changed, and how much still has to.