Has Claude Davis analyzed the sustainability and ecological impact of these food items?

Okay, that's a very interesting question. Many people are curious about Claude Davis and the "old-fashioned" way of life he promotes. Regarding whether he analyzed the sustainability and ecological impact of food, the answer might be a bit different from what you imagine.

Let's put it this way: he did analyze it, but not in the scientific way we are familiar with today.

Let me give you an analogy:

A modern environmental scientist analyzing food might calculate its "carbon footprint" (how much CO2 is emitted from cultivation and transportation to your table) and "water footprint" (how much water resource is consumed), and then produce a detailed data report.
Claude Davis is more like an experienced old grandfather. He won't show you charts, but he'll tell you: "Let's grow potatoes in the backyard instead of buying them from a supermarket thousands of miles away. This way, it's not only fresh and saves money, but you also don't burn as much fuel, and the earthworms in the soil live well."

Do you see the difference? His analysis is based on practice and common sense, not on data.

Below, I'll use a few points to help you understand better:

Claude Davis's Core Focus

His books, such as "The Lost Ways," fundamentally aim to teach people how to be self-sufficient, like our ancestors. This lifestyle itself contains "implicit" sustainability analysis:

Localization vs. Globalization: He strongly recommends growing your own food, hunting, and foraging. This directly eliminates the most environmentally unfriendly part of the modern food industry — long-distance transportation. When your food comes from your backyard, its transportation carbon emissions are virtually zero. This is the most direct ecological impact analysis.
Low-tech vs. High-tech Agriculture: The methods he teaches are old ways, such as using compost instead of chemical fertilizers, and natural pest control instead of pesticides. This itself is a protection of the ecosystem. The production and use of chemical fertilizers and pesticides are major pain points in modern agriculture due to soil and water pollution, and his methods perfectly avoid this.
Making the most of everything vs. Waste: One of the core tenets of ancestral living is "no waste." Every part of the food is utilized, for example, using bones for broth or vegetable scraps for chicken feed. This aligns perfectly with what we advocate now — "reducing food waste," which is a very important part of sustainable living.

Difference from Modern Environmental Analysis

So, to answer your question:

Did he "analyze"? Yes, by advocating a certain lifestyle, he implicitly analyzed and provided solutions. His entire philosophy is a sustainable ecosystem.
Did he "research" and publish reports? No. You won't find a single chart in his books analyzing how much environmental cost "superfoods" like "quinoa" and "chia seeds" incur when shipped from South America to your home. His focus is on what's around you and what you can do yourself.

In Summary

Claude Davis didn't act like a scientist, holding data sheets to tell you that food A is more environmentally friendly than food B.

But he addressed the issue in a more rustic, fundamental way: he directly provided you with a nearly "zero-impact" food acquisition solution. His analysis is embedded in every "do-it-yourself" suggestion.

So, it can be said that his entire philosophy is built on a very simple and practical sustainability, it's just that the language he uses is different from the scientific terminology we are accustomed to today. He is concerned with practice, not theory.