That's a very good point, but I think that would double or triple the length of any episode to delve into such details. Which is not exactly bad - one could jus

That's a very good point, but I think that would double or triple the length of any episode to delve into such details. Which is not exactly bad - one could just have less species introduced and more over arching story lines. But for their episodic style, I don't think it would have worked. I suspect any cursory mention of their alien multculturalism would be lost on the viewer, unless they always explicitly point it out. And, really, many of us do the same. People are pretty familiar with the subcultures of their own country, but many are not very familiar with the subcultures of other nations. Chinese food is a simple fast example. I suspect most people could not tell you what comes from which area/subculture. It's all just lumped together. Or when people refer to foreign government policy, and blame all the people for it, instead of just the government. Blah blah blah