A History of Vegetarianism
Seems like a a bogus point, though.
I love vegetables and often make near-vegan meals without realizing that there's no meat dish. But absent a deliberate decision *not* to eat flesh, it would never occur to me to leave the nam pla out of my braised kale, the anchovies out of my spaghetti with cauliflower sauce, or the bacon out of my sweet potatoes.
And Tristam Stuart's book is definitely a history of ideas, not of eager eaters accidetnally embracing vegetarian diets.