It's not just a diet: it's an empire. ;)

http://www.maruchan.com/

Indeed, these kinds of “staples” have made up the bulk of calories in pretty much all peasant diets around the world for the past 5000+ years.

Not just rice and wheat, but also including oats, barley, rye, maize, quinoa, potatoes, yams, manioc (a.k.a. cassava, yuca), taro, plantains, soybeans, peas, lentils, chickpeas, beans, etc.

Reliance on staples is the main reason that agricultural societies tend to have substantially shorter stature, shorter life expectancy, and more health problems than hunter–gatherer societies.

In recent times, the biggest problem is sugar though. Modern people consume ridiculous quantities of refined sugar in processed foods, fast restaurant food, soda and fruit juice, etc. Consuming large quantities of alcohol also isn’t helping anything.

Replace doughnuts with Banquet dinners and you described my college years well. I mean, there was also alcohol involved.

One little correction -> Meat has zero carbs. All kinds of meat.