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Davethulhu
Aug 12, 2003

Morbid Hound

DrSunshine posted:

Whoa, wait, what? :2bong:

Could you explain this, or, preferably, link to a book that explains it?

If you are living in a universe where it is possible to time travel into the past and change it, time travel will not be developed in that universe.

Proof:
A time travel machine is developed and people start traveling to the past. "Eventually"* someone changes the past in such a way that the development of the time travel machine doesn't occur. This happens whenever a time travel machine is developed.

*There isn't a word to express the concept of changes happening up and down the time line but "eventually" gets the point across.

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