re: Question about end of Interstellar: Dr Brandt (SPOILERS)

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I dont understand this part. Are you saying that they evolved independently of other humans through isolation?

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It's a little convoluted, but I think so.

Brand (the daughter) lands on Edmund's planet with the embryos...
which allows the descendants of those embryos in the VERY far future to develop the technology to create the tesseract...
which allows Cooper to relay TARS' gravity data back to Murphy through her morse code watch...
which allows her to solve Brand's (the father's) equations...
which allows the humans to build the spaceships and get off the planet...
which allows them to save Cooper when the tesseract spits him back out near the wormhole next to Saturn...
which allows Cooper to reunite with Murphy and realize that his life has passed him by...
which prompts him to go back into the wormhole and start a new life with Brand and the embryos...
which allows the embryos to survive and to become the beings that build the tesseract and the wormhole.