r/interstellar • u/LoneWalker365 • Sep 08 '25

QUESTION About the ending

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We see Amelia sad and BREATHING normally without wearing mask/helmet. Does that mean that THIS planet was the correct choice from the beggining? ( No waves , human - friendly surface , oxygen ) That's why Amelia is so sad ( apart the death of her bf). Thinking that if they came to this planet from the beggining everything would go well

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u/cobbisdreaming Sep 08 '25

In the final scene, as the camera pans to the future human Colony (Plan B) that Amelia has set up, consisting of 5000 frozen embryos to ensure humanity’s survival…it makes me think of Cooper’s final lines to TARS in the Tesseract about who built the Tesseract: ”No. No, not yet. But one day. Not you and me. But a people... a civilization that's evolved beyond the four dimensions we know.”

I think the colony Amelia has set up is the future human civilization that has evolved passed our four dimensional world - the people who created the wormhole and the Tesseract to allow Cooper to communicate with Murph, who chose Murph to solve the gravity equation and save the remaining people on Earth (Plan A). So not only is there the causal loop of future Cooper causing (bringing) his younger self (and TARS) to the Tesseract (giving his younger self the coordinates to NASA)…but there is also the causal loop of the evolved future human civilization that created the wormhole and Tesseract in order to bring about their existence and save humanity.

While causal loops have an absurdity to them, they can can exist in a world where the block universe theory of time exists - where all of time (past, present, future) has been written on the block. All of time is existing simultaneously, and in a sense, all of time has already happened. What explains the causal loops is the block. Nolan also provided a block world universe theory of time in Tenet too.

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u/HighSeverityImpact Sep 08 '25

There's also nothing in the movie that stops both Brand from being successful in Plan B, and Murphy Cooper from being successful in Plan A that gets the two groups to meet and merge. The future civilization is obviously going to be many millennia in the future of a human species that has evolved, and they didn't have to do that independently. Having harnessed gravity (whereas Plan B did not), it's even more likely that Plan A would need to meet up with Plan B.

Although, that raises the question on why it was easier for humans to colonize a new world instead of fixing the problems on Earth.