Dont scholars of American history know when to use the word prosopography?
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LOL. American historians? No.
When I was in Grad school there was a huge rivalry between the Ancient/Medievalist Historians and the American Historians.
The AH thought the A/M were irrelevant and the A/M thought the AH were lazy because sources were plenty and they didn’t need to do the language work.
Your experience in grad school was exactly the same as mine on that score!