The negative review that was posted a while back stated the
Weston Price Foundation is a " a non-credible group that bases its recommendations on the opinions of a dentist who wrote up his observations of indigenous populations in the 1930s."
First of all, Weston Price conducted scientific studies and wrote about his finding - these were not merely opinions.
Granted, the way studies are conducted now has changed since the 1930's. However, WEston Price recognized that these studies needed to be post haste, because he realized that the information was soon to be forever lost - as more and more cultures were being
infiltrated with a Western diets.
It is sad that his work does not stand up to the scrutiny of modern methods - but it's the best we will ever have, and it's better than nothing, IMO.
I am a former veg that has converted to a traditional diet much like the Weston Price Foundations. I came to it by learning from raising animals.
The first thing I learned was that adaptation to regional foodstuffs is a very important and powerful phenomenon - one I saw a strangely ignored by modern nutritional "experts". WE all know you can take an animal breed that is adapted to lush pastures, put it on the range or desert and watch it starve, while breeds of that same species who adapted to range, will thrive.
WE can put the range species on the lush pasture and watch it die of bloat or worms...
Why do we acknowledge these differences among animals but not humans? Why do the experts keep insisting they will find "THE" optimal one size fits all diet? I believe they have not and never will because it is a figment.
Second, I learned that adaptation takes time, but not thousands of years! I don't see any sense to go back to a caveman diet.
I just need to go back into my own ancestry a bit - to see when my forebears were healthiest.
In my case, my healthiest and longest lived ancestors ate very much a Weston Price style plan. To my delight, I have found that eating this way suits me better than any of the crackpot dietary plans I've followed in my lifetime.
I'm content, satiated, and feeling very healthy.
OK that was a very longwinded way to say that I don't believe claims that vegetarian or vegan diets are "healthier" because it's another one size fits all idea.
Animals are part of nature so of course we can't say they are bad for the planet. Only bad agricultural practices are bad for the planet.
That leaves the killing part.
But we can't live on earth without killing. Brushing your teeth or washing your hands is a daily genocide, for example. So the killing point comes down to the great arbitrary line. Which things do we accept as Ok to kill, and which not?
The one factor that remains, no matter who you are or what you decide, is that line will ALWAYS be arbitrary. Whether it's ok to kill everything but other humans, or other humans and cute pets,
or nothing that is we define as sentient, or whatever.