Great film if you remember it is art and you should take time to analyze it

Rating: 10/10 (3 April 2018)

This fils is acted and directed well so let me just get that out of the way. I have seen several theories on what this movie is about but I think most missed it. It is a solid Scifi movie in its own regard but past this point I will write what I believe this movie is truly about. Of course spoilers will ensue so beware.
Within the movie, there is a pointed speech about self-destruction. This is what the movie is about simply.
Why would a husband volunteer for a suicide mission? Why would a desparate window follow the husband into the abyss? Why would someone with cancer take the mission? So they identified all the people as self-destructive to be clear.
Aside from that, the focal point of the anomoly is at a lighthouse. What does a lighthouse do? It is designed to warn people to stay away from danger. The characters in the story continually walk toward the lighthouse which itself is self-destruction. In addition, when the main charater walks up to the lighthouse there are bone carefully arranged in a pseudo-pirate warning as if to say "Abandon all hope ye who enter here."
One of the last scenes is also supportive of this narrative as Natalie Portman realizes she is fighting herself within the alien double. She realizes her own self-destruction, and has to find a way to break the cycle.