05-04-2017, 04:30 PM
There are papers that show that two Krasnikov Tubes arranged in a certain way can lead to time travel paradoxes.
Myself, I prefer to go with no FTL at all. With relativity, longer lifespans, multiple copies of individuals, and deep sleeps, most of the plot reasons that require FTL can be worked around when you consider future society.
But if you HAVE to use it, then OA's wormholes are probably the best solution. The idea that they destabilize if accelerated to relativistic velocities means they cannot be arranged as time machines, so you get all the benefits of zipping around the galaxy, without the headache of time travel.
Myself, I prefer to go with no FTL at all. With relativity, longer lifespans, multiple copies of individuals, and deep sleeps, most of the plot reasons that require FTL can be worked around when you consider future society.
But if you HAVE to use it, then OA's wormholes are probably the best solution. The idea that they destabilize if accelerated to relativistic velocities means they cannot be arranged as time machines, so you get all the benefits of zipping around the galaxy, without the headache of time travel.