One thing that Pollan (the reviewer) doesn't discuss here is the degree to which food culture and food habits intersect with regional and class identity formation and tribalism.<p>Food habits and trends seem to work both for and against those tendencies. On the one hand, foods once associated with hippies like tofu or almond milk can be bought anywhere there is a major grocery store. Even the taste for spicy/piquant food has become quite normalized and not anymore uniquely characteristic of particular ethnic communities.<p>On the other hand, the kind of places you actually buy your food are highly tribalized, with some socioeconomic classes preferring local and uniquely branded food and groceries, while others prefer chain type fast food and more "common" grocery stores.<p>It's fascinating that food has both the power to bring people together and also to polarize and separate them.