Theres also a theory that changing anything would create a parallel universe at the point you altered the original timeline. 🤔🤓
Here's a very simplistic but slightly more rigorous way I convince myself that the chaotic worldview makes more sense than practically anything else:
Classical physics is
deterministic, that is, it has a very rigid set of rules that is always followed; no exceptions. If you start 100 copies of the same experiment with the exact same setup and conditions, all of them will yield the same result 100% of the time. However, even such a rigid system of physical laws can
easily give rise to a chaotic system where changing the initial conditions even the tiniest bit gives results that are completely different than before. The double-pendulum GIF on the wikipedia page on Chaos Theory is a great visual example of this.
The point is that even the very rigid rules of classical physics are not immune to chaos -- what then of the real world, which turns out is governed instead by quantum physics, whose nature is not deterministic but probabilistic instead? Seems to me that it's just going to be even more chaotic.
Well the reason we could assume that it's 'resilient' is essentially the theory that the past no longer exists. (Has problems of its own).
I.e, you can't travel back to the past because there's no past to travel back to. Just an eternal present.
That goes counter to special (and general) relativity, which is 100% proven (and is part of the basis of our current GPS systems). Time is not "alone", space and time are two sides of the same coin, and are more properly referred to as spacetime. This gives rise to some mind-bending seemingly nonsensical consequences like the Twin Paradox.
To conclude: My past might be someone else's future, and vice versa, so claiming that "the past" ceases to exist raises the question: whose past?
