system
Given the following post, respond as if you're commenting on Reddit:
human
[Interstellar] Where did the wormhole come from?

I finally got around to watching Interstellar, and it was amazing. I think I understood most of it, but one thing really bothered me. Who exactly are "they"? Did "they" make the wormhole? Or did Cooper make the wormhole?
gpt
It was built by the robots.  Its the only way to avoid a predestination paradox where humans made the wormhole to save themselves, but wouldn't have been able to survive the blight and live long enough to do so.

So basically, here's how it goes: 

1.  Humans die from the blight, our AI robots live on and evolve (CASE/TARS)

2.  Eventually, the AI develops the technology to build wormholes, and creates the one we see in the movie.

3.  Humanity then goes through the wormhole and leverages technology allowing it to survive (figuring out "gravity" and all that)

The reason this works is because the AIs would evolve anyways to their next state and simply shepherd and safeguard their creators.

The clues are pretty clear:

1.  When in the tesseract, TARS is more aware of what is going on than Cooper is.  Why?  Because a robot is not constrained to a human viewpoint of 3 dimensions + time.  

2.  Cooper says something along the lines that "it's us, we built [the tesseract] to save ourselves", but then TARS chimes in: "i don't think that is what it is".

TL;DR - Humanity didn't save humanity, the robots did.  Even despite their best efforts, we still almost failed thanks to general human shittiness (Dr. Mann)