Why does faster than light travel violate causality?

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The way I think I understand it, even if we had some “element 0” like in mass effect to keep a starship from reaching unmanageable mass while accelerating, faster than light travel still wouldn’t be possible because you’d be violating causality somehow, but every explanation I’ve read on why leaves me bamboozled.

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Anonymous 0 Comments

You have to think of causality as a reaction. Whatever the “causality” event is in any hypothetical is a reaction to some other form of stimuli. THAT stimuli can only travel as fast as the universal speed limit.

It’d be like accurately yelling that gondor calls for aid 10 minutes before the light of the Beacons ever hit your land.

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