1.1.1 Homo sapiens
Change in diet is important in a changing species over a time as long as fifty million years.  The earliest creatures in theseque3nce leading to man were numble0-eyed and delicate-fingered insect an fruit eaters like the lemurs.  Early apes and hominids from Aegypopithecus and Procosul to the heavy Australopithecus, are thought to have spent their days rummaging mainly for vegetarian foods.  But the light Australopithecus broke the ancient primate habit of vegetarianism.  The change from a vegetarian to an omnivorous diet, once made, persisted in Homo erectus.
J Bronowwski