A fantastic resource that I just stumbled upon today is Duke's Ad*Access digital collection, which has a large, keyword-searchable database of ads from the first half of the 20th cent. Here's one from the United Airlines that features the UN. https://repository.duke.edu/dc/adaccess 
@gbrew24 I searched Iran and here's what came up
@asa_mckercher North Americanism, as depicted by American Airlines in 1943. Note Uncle Sam's height.
@ummodern Here's a depiction of "economy" in 1918.
@WiggsDevin 1947, or that year when "empire" was still a selling point.
@dbessner a potential cover for your next book
You can follow @DexterFergie.
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