A while back the notion that humanity would be the end of itself seemed vile to me. How could we pose a threat to our own selves?
However, on another level it makes perfect sense. Adam Smith proposed the idea of an invisible hand in Economics. A force that makes sure the market is in equilibrium. I think there exists an invisible hand for humanity as well. It is us. We are our own creators and destroyers. Whenever humanity fails to an extent correction can’t bring it back we balance it out by ending ourselves and start afresh, with a clean new slate.
It may sound absurd but I believe that we’ve had multiple apocalypses and multiple stone-ages and evolution with the outcome being the same every-time. Shiva is known to be the destroyer. The annihilator of worlds. He has a third eye which triggers the destruction, the apocalypse. The third eye opens when our failure is so huge and so out of hand, it can’t be corrected . Something like the climate crisis is just putting reason to this inevitable storm that we are approaching.

Stonehenge in England and the great pyramids of Egypt were constructed during primitive times when technology was basic. Their construction can be explained by the existence of a race as advanced as ours and when they reached their culmination, the point they had gone so rotten that they couldn’t be brought back, they acted as their own invisible hands and maintained equilibrium by ending themselves without intending to.
I don’t believe Earth is ever going to see technology such as time travel. simply because humans, the smartest species on the planet will never be able to evolve to that level in a single span. Humans, while equipped with the most sophisticated thinking power are designed to go rotten and eventually, fail.