If you saw INTERSTELLAR and are still confused, this should clear things up
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- 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
Why would another race give a damn about some primitive lifeforms? Why not? Haven't you heard of Green Peaces?