I find this interesting. The meals themselves have changed dramatically – but from the graph the resources haven’t changed that much at all. It seems like all theses grains for example are now just spread out into our meats etc. Same too with the less palletible meats – used industrial food processing perhaps.
“Diet. We have a tendency to romanticize “the good old days” of fresh foods and home cooked meals. Yet when you look at what the majority of people were actually eating on an average day in 1930, it looks considerably less appealing: fresh vegetables in season, yes, but the rest of the year it was grain, milk, more grain, beans, and cuts of meat, like salt pork and calf’s liver, that most Americans won’t touch today. Bread and milk was an actual meal that many people ate for supper, and not because it was homey and charming, but because most people could not afford the rich diet of the modern American.”
From: http://www.cato-unbound.org/2015/03/04/megan-mcardle/its-complicated-hopeful
Graph also from above article:
is also good.