Wormholes and Fancier Conventional Tech certainly require the least screwing around with the Laws of Physics. Wormholes of some sort seem to be the method of choice for SF that's not really focused on the Space Travel as such.
If you set up a less screwy Star System, the Firefly set-up seems like it'd make a pretty good basis here: Entire system colonized, Earth either gone or far enough behind that it's irrelevant, sub-colonies rebel. Depending on how you set that up, it's doable with Fancier Conventional Tech.
Sporadically usable Wormholes could get you there without having to worry about the interstellar part, too.
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chiming
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Date: 2012-04-03 02:34 am (UTC)From:If you set up a less screwy Star System, the Firefly set-up seems like it'd make a pretty good basis here: Entire system colonized, Earth either gone or far enough behind that it's irrelevant, sub-colonies rebel. Depending on how you set that up, it's doable with Fancier Conventional Tech.
Sporadically usable Wormholes could get you there without having to worry about the interstellar part, too.