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

Because you would arrive before the information surrounding your arrival would arrive.

i.e., If you moved a Star faster than c, it would arrive at its destination before its gravity well arrived at its destination.

What might be the only possible way for a FTL travel would be worm hole as this wouldn’t really be violating FTL. You enter below FTL speed, you exit below FTL speed, you just appear somewhere else, but all the information of your arrival would arrive as it should.

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