I can’t recommend the book [Lucy: the Beginnings of Humankind by Donald Johanson] enough. It should be a part of every low-carbers library. Once you read it, you will know what it means when you read that Austrolipithicus africanus had elevated levels of Carbon-13. You will realize how far back in our lineage we were meat eaters. And you will find out what happened to the branch of pre-humans who evolved down the plant-eating road.