In our latest Freakonomics Radio on Marketplace podcast, Stephen Dubner and Kai Ryssdal talk about the unexpected reasons why American food got so bad. (Download/subscribe at iTunes, get the RSS feed, listen live via the media player above, or read the transcript.) In his forthcoming book An Economist Gets Lunch: New Rules for Everyday Foodies, economist Tyler Cowen pinpoints specific moments in history that affected American food for decades to come. From Prohibition to stringent immigration quotas to World War II, Cowen argues that large societal forces threw us into a food rut that lasted for roughly 70 years: COWEN: I think there is a very bad period for American food. It runs something like 1910 through maybe the 1980’s. And that’s the age of the frozen TV dinner, of the sugar donut, of fast food, of the chain, and really a lot of it is not very good. If you go back to the 19th century and you read Europeans who’ve come to the United States, they’re really quite impressed by the freshness and variety that is on offer. Cowen has put a lot of thought into how our food makes it to our plates, and his own meals are carefully considered, for sure; but don’t call him a food snob: COWEN: Let me just give you a few traits of food snobs that I would differ from. First, they tend to see commercialization as the villain. I tend to see commercialization as the savior. Second, they tend to construct a kind of good versus bad narrative where the bad guys are agribusiness, or corporations, or something like chains, or fast food, or microwaves. And I tend to see those institutions as flexible, as institutions that can respond, and as the institutions that actually fix the problem and make things better. So those would be two ways in which I’m not-only not a food snob, but I’m really on the other side of the debate.