WHAT WOULD HAPPEN IF EARTH BECAME A PLANET OF VEGANS?

Homo sapiens

And there would be no place for it on a planet like this. It was meat-eating and the need to hunt and kill food that led to the development of the brain of higher primates.

Landscape

The topography of the planet would be very different. Without predators, the Earth would simply be deserted.

Diversity

The diversity of species would be incredibly scarce due to the uniformity of diet.

Mammals

It is unlikely that they would have appeared in principle, since casein (a component of milk) is an animal protein, clearly not pro vegan.