Because we lack sharp claws, aren't very fast on our feet, and aren't exactly endowed with lightning reflexes, it would be very difficult if not impossible for us to run down an animal, catch it with our bare hands, and tear through its fur and skin in order to eat it. Biologically, we are designed to be frugivorous herbivores eating mainly fruits, seeds, roots, and leaves.
Simple Recipes for Joy: More Than 200 Delicious Vegan Recipes (ed. Penguin, 2014) - ISBN: 9780698170117