The question of who the mysterious 'They' are in Interstellar continues to fascinate viewers around the world. It was these beings who helped humanity escape a catastrophic dead end — opening the wormhole, creating the tesseract, allowing Cooper to transmit the data to Murph and save Earth. But who they actually were is a question that director Christopher Nolan never fully answers — instead offering a canvas for endless interpretations.
Cooper himself believes that 'They' are humans from the distant future, who have evolved beyond the limits of time and space. But that theory is hardly definitive. It may be a classic paradox: if 'They' are the descendants of the humans who survived, how could they exist without having helped themselves in the past?
Another theory suggests 'They' aren’t human at all, but a higher intelligence that decided to intervene in history. This idea becomes especially persuasive when you consider that the wormhole appeared without explanation. In Interstellar, humanity is but a speck in the universe, and the notion that we were saved not out of compassion, but for some other, unknowable reason is unsettling — but logical.

The film also offers hints that everything we see is part of a time loop. What if Cooper isn’t the first — or the last — to pass through the black hole? Perhaps 'They' are the universe itself, responding to those who truly believe in the power of love and intellect.
Nolan, as always, leaves the most important parts unsaid. His 'They' are less characters than a mirror in which the viewer sees their own fears, hopes, and belief in miracles. And so, everyone is free to choose their own version — and be absolutely right in it.