The current buzzword circulating among the worthies pushing back against modern living is veganism.
There is probably something worth teasing out in their philosophy, but for the life of me, I can't see it.
Like beards and tattoos, it's groupthink and if you aren't in, there is something a little odd about you.
There is one interesting fact that is beyond dispute.
Veganism is a modern construct utterly at odds with ancient diets. Vegetarianism is fine, as it includes some animal products, but prior to 1972 if you followed the vegan pathway you would certainly have died prematurely.
Why?
Because that's when vitamin B12 was synthesised!
And notwithstanding the noise generated when you put forward the B12 argument, without B12 supplementation, as a vegan, you are toast.
This from the Vegan Society: