"It is not my intention here to recount the history of the series or of the fan phenomenon, as these have been fruitfull explored in a number of popular and scholarly sources. Rather, I want to devote more attention to what I believe to be one of the least discussed aspects of the Star Trek phenomenon-the relationship of the series to the Cold War subtext of the post-war science fiction genre, especially in the context of the show’s original broadcasts during the period of the greatest scalation of the Vietnam War, 1966-1969. The meaning or appeal of any widely popular and enduring classic such as Star Trek is not reducible to any single reading or interpretation However, if we are to understand Star Trek in historical context, its mediation of Cold War themes would seem to be an important underlying element of the series and one worthy of further investigation."
January 1, 1970
https://en.wikiquote.org/wiki/Star_Trek%3A_The_Original_Series