I always thought that the first StarTrek series focused on a fleet of ships governed by a global federation, hence the diverse nationalities/origins of the crew: Scotty, Uhura, Spock, Sulu. Wow, that's four whole crew members who are not Americans!!!
So, then they got out the modeling clay and got even more diverse with more extraterrestials on the crew, plus a French guy on the Bridge! And a walking talking synthetic life form. I liked the show, at least the first series and the few episodes of TNG that I watched. After that, I kind of lost interest. The film, The Wrath of Khan, was a kitschy delight. "Quien es mas macho? Lloyd Bridges o Ricardo Montalban???"