"Small universe syndrome" has been discussed before many times, but what are the benefits/reasons and the drawbacks for doing so?
Positives:
* It gives an episode personal stakes which complicate the issue - having to choose between someone you know/like and what's right, needing to succeed so the person will live/win (this can be done directly ("my sister's in trouble out there!") or through comparison ("you're doing this/thinking this because it reminds you of what happened to your friend!"))
* It allows us to explore a character's family life without having to put it in a B-story that has nothing to do with the A story, or as the A-story itself (which I gather a lot of people also complain about)
* It creates conflict (though some think Humans should have moved beyond that by then)
* It keeps the world and its components from being a mile wide and an inch deep (worldbuilding)
* It greases the wheels (knowing someone who is an expert at _____ comes in handy, and if you already created such characters, why not use them again? - Create a new one and people will ask, "hey, why didn't they just ask so-and-so?")
* any particular discipline, organization, career choice, people group, etc. will naturally have a network of friends and acquaintances and families often do have multiple members in a particular field (military, medical, science, arts, etc.)
Negatives:
* It makes everything seem too good to be true (what are the odds that you frequently know/are someone who's personally affected by so many events, particularly in an entire universe of people, let alone a city, country, or Earth in non-Trek shows?)
* It limits possibilities for future stories, either in fact or in the minds of viewers and future writers.
* It complicates some issues needlessly, to the point of distraction or absurdity
* It makes the assumption that a great character has to come from a line of similarly influential people in the same or similar circles, and that people can't employ shared skills (leadership, compassion, debate, etc.) in different fields
* Characters turn into Swiss army knives, knowing and being able to do whatever the story calls for
I'm discussing this in reference to Trek in particular, but comparisons to other shows are welcome within reason.
Positives:
* It gives an episode personal stakes which complicate the issue - having to choose between someone you know/like and what's right, needing to succeed so the person will live/win (this can be done directly ("my sister's in trouble out there!") or through comparison ("you're doing this/thinking this because it reminds you of what happened to your friend!"))
* It allows us to explore a character's family life without having to put it in a B-story that has nothing to do with the A story, or as the A-story itself (which I gather a lot of people also complain about)
* It creates conflict (though some think Humans should have moved beyond that by then)
* It keeps the world and its components from being a mile wide and an inch deep (worldbuilding)
* It greases the wheels (knowing someone who is an expert at _____ comes in handy, and if you already created such characters, why not use them again? - Create a new one and people will ask, "hey, why didn't they just ask so-and-so?")
* any particular discipline, organization, career choice, people group, etc. will naturally have a network of friends and acquaintances and families often do have multiple members in a particular field (military, medical, science, arts, etc.)
Negatives:
* It makes everything seem too good to be true (what are the odds that you frequently know/are someone who's personally affected by so many events, particularly in an entire universe of people, let alone a city, country, or Earth in non-Trek shows?)
* It limits possibilities for future stories, either in fact or in the minds of viewers and future writers.
* It complicates some issues needlessly, to the point of distraction or absurdity
* It makes the assumption that a great character has to come from a line of similarly influential people in the same or similar circles, and that people can't employ shared skills (leadership, compassion, debate, etc.) in different fields
* Characters turn into Swiss army knives, knowing and being able to do whatever the story calls for
I'm discussing this in reference to Trek in particular, but comparisons to other shows are welcome within reason.