I went vegan in 2007 after being veggie since 2005. Its the best decision I ever made... leading me to think if only I'd always been vegan and that the same for everyone else. It got me thinking that if everyone had always been vegan then there would be so much good intention and everyone would be much healthier, much happier and there would be less suffering. If all the dangerous animals were prevented from breeding and only animals that can survive as vegans were allowed to live then the world would be a much safer place.
Humans have essentially played gods for millennia. We are the reason the world is choking to death.
Preventing certain species from breeding would be the ultimate act of hubris, and quite probably spell the end of life as we know it.
Nature is certainly cruel, but it's a balance.
Without us on the planet it would be covered in forest, jungle, grasslands and be teaming with life.
As it is, less than 4% of the mammalian biomass on Earth is wild animals. That's what we've done to it... And you want to reduce that further?
Without predators, certain herbivores would decimate the environment...
This is the very reason, for instance, here in Sweden, where the wolves have all but been driven to extinction, that hunters get to kill moose, deer and wild pigs in the name of conservation.
And the thing is, they do need to be reduced in number. Sure, we could find non-violent methods, but they would be more expensive and let's face it, are not going to happen.
By the way, no non-human animal can be vegan. Veganism is an ethical position, not a diet. Gorillas are plant-based, but also eat insects, and even deer and moose and zebras and wildebeest will consume a certain amount of insects also.
Your ideal, predator-free world would essentially be teaming with rabbits, koalas and 3 toed sloths. Most other species of herbivore are also opportunistic omnivores.
Ruminants, who do eat mainly grass and vegetation also take the occasional egg or baby bird. Even horses will eat small rodents or birds from time to time.
I do understand the idea, but haven't we already meddled enough?