Arrival 2016
Taking place after alien crafts land around the world, an expert linguist is recruited by the military to determine whether they come in peace or are a threat.
Spoilers for Arrival
Submitted by: aberen
Louise learns the ability to see the future via the Alien Language. She stops a war from happening by seeing glimpses of a future where she has convinced the Chinese General Chang to not attack the aliens. The future she then creates in the movie by calling General Chang. Bootstrap Paradox!