Rating this book 3 stars because of the research needed to write the history of how we became meat eaters, and also because the author wrote in her intro that she wanted this book to be factual and not sway anyone towards a certain diet. However in the epilogue she clearly stated that "it's time to switch from meat towards a vegetarian diet." She's also vegetarian but eats fish and occasional bacon. So really biased and a bit confusing in my opinion.