You know what a lima bean does when it's attacked by spider mites? It releases this volatile chemical that goes out into the world and summons another species of mite that comes in and attacks the spider mite, defending the lima bean. So what plants have - while we have consciousness, toolmaking, language, they have biochemistry.
A cow out on grass is just an incredible thing to behold... Cows and other ruminants can do things we just can't do. They have the most highly evolved digestive organ on the planet, called the rumen. And the rumen can digest grass. It takes grass, cellulose in grass, and turns it into protein, very nutritious protein. We can't do that.
To a very great extent, it's the fast-food industry that really industrialized our agriculture - that drove the system to one variety of chicken grown very quickly in confinement, to the feedlot system for beef, to giant monocultures to grow potatoes. All of those thing flow from the desire of fast-food companies for a perfectly consistent product.
Simply by starting to cook again, you declare your independence from the culture of fast food. As soon as you cook, you start thinking about ingredients. You start thinking about plants and animals and not the microwave. And you will find that your diet, just by that one simple act, that is greatly improved.
If you made all the French fries you ate, you would eat them much less often, if only because they're so much work. The same holds true for fried chicken, chips, cakes, pies, and ice cream. Enjoy these treats as often as you're willing to prepare them - chances are good it won't be every day.
I can probably earn more in an hour of writing or even teaching than I could save in a whole week of cooking. Specialization is undeniably a powerful social and economic force. And yet it is also debilitating. It breeds helplessness, dependence, and ignorance and, eventually, it undermines any sense of responsibility.
Species co-evolve with the other species they eat, and very often, a relationship of interdependence develops: I'll feed you if you spread around my genes. A gradual process of mutual adaptation transforms something like an apple or a squash into a nutritious and tasty food for a hungry animal.
Travelling the railways of Europe with a century-old guidebook can be disconcerting: fares, food, and drink seem shockingly expensive compared with what they were; trains and paddle-steamers run to unexpected timetables (assuming they're still running at all); and not only states but whole empires have been wiped from the map.