Recently I've had the chance to revisit some of my favorite sci-fi, one in books and one in tv series, which I like for pretty similar reasons. The TV show is Babylon 5, and the books are the Sector General short stories/novellas by James White.
Both of them have a very similar setting: a space station on which various species meet in a challenging, but not hopeless, attempt to learn more of each other and live peaceably. Babylon 5's setting is a trade and diplomatic station, while Sector General is an enormous space hospital. I think part of the allure for me is a lifelong obsession with institutions in fiction--I loved boarding school stories as a child--which I suspect is largely because they are exotic, as I have spent my life entirely outside of them, never having attended an ordinary school or worked somewhere with more than a dozen employees. In real life, I'm pretty sure I'd go crazy inside of a week in a space station, I can barely handle a day trip to downtown Seattle.
Sector General adds to this a great deal of speculation on different planetary conditions and types of sapient species. Unhampered by the limits of special effects, and with the need of the doctors to understand and prescribe treatment, the author goes wild with speculation on different theoretical body forms and social structures--an empathic giant insect, massive beings who can function in a vacuum but need to paint their food on, calm and small beings who form into a rampaging mass under stress, and of course plenty of tentacles. Babylon 5, like most 20th century TV sci-fi, mostly has to stick with the humanoid with prosthetics on the head concept for the major species, although Dr. Franklin does get to tackle the occasional odd biological need.
On the other hand, Babylon 5, having been plotted as a multi-season show, delivers a uniquely satisfying and complex overarching plotline that deals with questions of identity, meaning, survival, and spirituality. That also gives time for some incredible character development, and my favorite part of the whole show is watching the individual choices and events that turn Londo and G'Kar, two washed-up playboy diplomats from different worlds, one into a saint (with a rascally side) and one into a supervillain (with some redeeming qualities), every step of the way perfectly believable and consistent.
Sector General suffers from some of the obvious weaknesses of originally serial fiction, like the basic points being explained over and over, as well as the shockingly casual sexism of the 50s. Apparently it is much easier to envision a doctor with a carapace than a doctor with ovaries. Though it does moderate that in time and in the later stories the comely nurse is permitted to become a pathologist and the prohibition on women taking on the top role ameliorates from a universal rule to a possibly irrational prejudice of the Chief Psychologist.
Babylon 5 fortunately is from a different era in that regard, and in fact has just as many main female characters as male, who have their own lives and goals and do not exist merely to be prizes for the men. Babylon 5 also is unusual in not assuming that spirituality will be cast aside just because a species develops interstellar travel, and religious figures and themes are frequently explored, in their potential for comfort, conviction, and conflict. (It is funny to watch B5 thirty years out and see the technology it misses that was just around the corner. Cell phones and laparoscopic surgery would have solved a lot of the problems that come up.)
But I think the thing I love most about these two things is the way they explore the question of how can we, seeing things differently, needing different (often conflicting) things, find a way to live at peace? Both Babylon 5 and Sector General are born out of a devastating war engendered by interspecies misunderstanding and a desire to know each other better to prevent future war. Sector General's backstory begins with two former combatants from the opposite sides, traveling about the galaxy to promote peace. But they are not pleased with the effects of the laborious efforts on all sides to avoid offense for fear of another war:
"We must get to really know them, Colonel," MacEwan went on quickly, "Well enough not to have to be so damnably polite all the time. If a Tralthan jostles a Nidian or an Earth-human, we must know the being well enough to tell it to watch where it's going and to call it any names which seem appropriate to the occasion. We should expect the same treatment if the fault is ours. Ordinary people, not a carefully selected and trained star-traveling elite, must get to know offworlders well enough to be able to argue or even to quarrel nonviolently with them. . . "
Eventually Sector General is established for that purpose--where different species can work alongside each other in common cause, and thus get the chance to really know each other--and cuss each other out as the need arises. And in time Babylon 5 provides similar opportunities to those willing to take them. Because it's not enough to have an arms' length tolerance and a list of offenses to avoid. What we need is to genuinely know each other. Which is pretty good advice for Earth, too, and we don't even have to set up a contact suit for chlorine breathers.