Gorillas are fine with being herbivores, like this one at a Seattle zoo. But humans evolved as omnivores. Is diet destiny? Ted S. Warren/AP hide caption toggle caption Ted S. Warren/AP The Salt For Most Of Human History, Being An Omnivore Was No Dilemma April 20, 2012 Humans and other primates have been omnivores for some time, which may have given us an evolutionary edge over strictly meat or plant eaters, a new study shows. It may have also prompted us to wean our babies faster, another study says.