Quick Star Trek question that pops into my head occasionally:

[conuly]

Is there an in-universe explanation as to why, exactly, so many (human) Starfleet officers are fans of Earth history, specifically the history and culture of the mid-to-late 20th century USA? And why so very few of them are invested in, say, the history and culture of Joseon-period Korea, pre-Sarek Vulcan, mid-whateverth-era Betazed, etc?

(Seriously, I would absolutely love it if a random go-back-to-earth-time-travel episode ever landed them somewhere other than the USA.)