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Worldbuilding

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    $\begingroup$ There is no guarantee that traveling through a wormhole would take less time than going through normal space at c. This would preserve relativity. $\endgroup$
    – Justin Thyme the Second
    Commented Jun 21, 2022 at 23:15
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    $\begingroup$ I believe the issue is causality not relativity. On face value all forms of FTL violate causality. But depending on the assumptions underpinning the type of FTL used and the interpretation of relativity chosen you can devise scenarios where causality is not broken. With wormholes the issues are the positioning of each end (relative to each other). How close they are and the velocity of one end (relative to the other) when an object travels through them. So if you avoid combos of position and velocity etc that break causality you can in theory use them for FTL travel. $\endgroup$
    – Mon
    Commented Jun 22, 2022 at 3:40
  • $\begingroup$ Going on. As 'simple' solution to the dangers of a causality breach is to have the laws of physics themselves prevent them from happening i.e the laws of physics means that any attempt to breach causality using a wormhole cause the wormhole to collapse before causality can be violated. (Just don't be the one trying to travel traveling though the WH the instant it's tried.) So you could perhaps posit a network of WH that allow FTL be they man made or 'natural'. $\endgroup$
    – Mon
    Commented Jun 22, 2022 at 3:44
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    $\begingroup$ @Mon if causality can be breached by spaceships it can also be breached by subatomic particles and it will do so all the time. $\endgroup$
    – Stack Exchange Supports Israel
    Commented Jun 22, 2022 at 8:30
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    $\begingroup$ @Mon I don't follow how the wormholes could break causality. $\endgroup$
    – Daron
    Commented Jun 22, 2022 at 9:35