[Hogg]

Leaving out all the other "mysteries" of the story, I still don't understand how the entire wormhole/tesseract/etc. occurred if Murph had to use Cooper's data to save humanity. Isn't that a paradox? If humanity perished, how did it ever reach the point of manipulating space/time to construct the wormhole, summon Cooper, etc.?

[rakoo]

I only saw the HD image posted by drinchev, and I think it explains this quite well:

- Cooper sends back data to Murph so humans on earth can build space colonies but they aren't much more advanced than that. They basically "just" survived

- Humans continue working on the data after the end of the movie, ultimately being able to create tesseract

- They create the wormhole next to Uranus and the final tesseract for past Cooper to send data even further in the past

[dwild]

I guess it's just better to believe that there was actually another species that actually made them for us but the ego of Cooper is so big that he believed that it was themselves from the future.

[undersuit]

No, he reasons that it must be humans because why would a completely alien, 5th dimensional race give a damn about some primitive lifeforms on the 3rd planet of a minor star in a minor galaxy.

[dwild]

Humans were a 5th dimensional race? That was never the case.

Why would another race give a damn about some primitive lifeforms? Why not? Haven't you heard of Green Peaces?

[undersuit]

Post-humans are conjectured by Cooper to be a 5th dimensional race. (Post-)Humans would be very interested in setting up the events in the past(woah slippery slope) that set the stage for the eventual emergence of post-humans.