PART II: What Kind of Food Should I Eat?
RULE #31 - Eat wild foods when you can.
Two of the most nutritious plants in the world - lamb's quarters and purslane - are weeds, and some of the healthiest traditional diets, like the Mediterranean, make frequent use of wild greens. The fields and forests are crowded with plants containing higher levels of various phytochemicals than their domesticated cousins. Why? Because these plants have to defend themselves against pests and diseases without any help from us, and because historically we've tended to select and breed crop plants for sweetness; many of the defensive compounds plants produce are bitter. We also breed for shelf life, and so have unwittingly selected for plants with low levels of omega-3 fatty acids, since these fats quickly oxidize - turn rancid. Wild animals and fish too are worth adding to your diet when you have the opportunity . Wild game generally has less saturated and more healthy fats than domesticated animals, because most of these wild animals themselves eat a diverse diet of plants rather than grain (see Rule #27).
"Eat food. Not too much. Mostly plants."