Basic food sustenance, along with basic literacy, has mostly been achieved in United States. One can almost say there aren't starving Americans in a superpower that is spending abroad for conquered societies. Obviously that isn't exactly the case, as seen by dramatic numbers of people who fall through the cracks. However even the homeless can scrape enough to get mass produced rice and bread. Starvation is not a problem as seen by the obesity rates of the poor (and corresponding drains on health infrastructure as well as stagnating life spans). Mission accomplished?
Not exactly. Try going to a gas station in rural areas of United States and finding anything that is healthy. Healthy is a rather vague term but lets work with a definition of a food that at least doesn't do harm. You might find some milk and low fat cheese or even eggs occasionally. Vast majority of what you'll find is tightly sealed in plastic and resembles military MRE ration packs. We're talking about food so full of preservatives, salts, and fats that it can survive indefinitely. When this type of food hits a ravenous stomach, the result is a lot of energy expanded by the body to just break it down and separate the molecules. We're all familiar at this point with the side effects of too much corn starch, sodium, sugars, salts, and de facto saturated fats (recent regulatory efforts against blatantly detrimental transfats just touch upon the tip of the iceberg). We're also familiar with nutrient deprived white bread, pasta, and rice that fills the hunger gaps in a lot of American population. Sure, rice and pasta cartons can say they are enriched with vitamins but one doesn't have to be a rocket scientist to see it's not the same vitamin level one would get from chickpeas, pricier grains, and fish.
How easy is to prepare a non-damaging meal? Most American supermarkets are larger versions of the gas stations and corner stores. The mega food markets are monuments to the sheer inefficiency of residential living in United States and a reason why more preservatives are put into food than necessary. Getting food (healthy as well as damaging) from the source to a person's mouth in a 4th largest country in the world ain't easy. The sheer logistics of getting it from the mega farms across hundreds or thousands of miles to the supermarkets necessitate additional preservatives and salts for storage.
It was one thing in early 20th century when food production was more decentralized and many people actually grew their own. It became another when people decided to live in first the urban areas and then suburbia to escape proximity to ethnic minorities in the inner cities. Suburban living and decline of the small farmer greatly increased the need to add life damaging preservatives to all manner of food. Food couldn't just be shipped by train to the cities but now needed to be also driven from offloading hubs to the suburban supermarkets. Large farms acquired state subsidies, tax breaks, and self sustaining political clout. Many emerging agricultural corporations then drove smaller farmers not qualified for such bailouts out of business and put food source out of proximity for many communities. Many would have done it with mass production and won the hearts of poorer consumers anyway. Now that the population has exploded we are seemingly stuck in this process.
Some things of course can be done. One is eliminating subsidies for things like corn which allow cement-like cornstarch to be artificially cheaper and used more widely to hurt millions of Americans. Then of course tax payers can foot the bill for subsidies for new categories of non-damaging foods like quinoa. It'll artificially make healthier ingredients in diners, restaurants, and supermarkets cheaper through mass production. The underlining logistical problem is not resolved however. Food quality will only improve through educated demand from segments of the population.
We already see the explosion of popularity of Wholefoods in urban areas. Pricey food acquired from a salad bar there does not give a sickening feeling to one's body compared to same amount spent on a meal from say, Applebees. A lot of the food found in these stores gives a feeling of energy as the stomach acids are able to rapidly absorb and integrate nutrients from fresh products. Wholefoods pays enormous amounts of rent in area like Manhattan. The endless lines of white people patiently standing there indicate that it will continue growing and the model is working. As it grows, there is bound to be a competitor with even healthier offerings and we should see this level of food quality reach most of the American population by 2020s. At that point however, the wealthier educated consumers will be buying even healthier designer food and the process will repeat.
Considering United States is a large country, the physical energy required to bring Whole Foods level quality to most urban areas is enormous. We see the education gap between the wealthier and poorer Americans continuously compounded by the nutritional gap that is never fully closed. Higher fertility rates of the poor would indicate that the health/nutritional gap is likely to grow in the years ahead as well as differences in life span and physiological functioning. In the old days the poor would have less caloric intake per day and it would stunt their growth and life. In the modern world there is plenty of calories to go around but the stunting of functioning manifests in other ways. A person who eats deep fried foods, Ramen, McDonalds, pizza, and energy drinks will not do as well when it comes to learning and passing exams compared to a person who eats grains, fresh fish, and juices. This is something that educational system reformists need to look at very seriously and from the perspective of improving mental functioning.
lack of deterioration of the "meat" patty over time.
A lot of muckraking has been done over the years on the food situation and logistics in this country. We are beginning to see some change with return of the small farmer under the organic umbrella. The change is rather slow considering the amount of information available and the political power of the large farms. The national level of nutritional quality is as likely to sharply improve as the Chinese police respecting Miranda rights 10 years from now.