In the Jurassic Park novel there is a character, Ian Malcolm, that rambles on about "Chaos Theory". In the book this is partly because he's high on morphine after a T-rex injures his leg.
But his rambling frames the story's theme. That humans can't control, or predict, a complex system such as nature, let alone a park, with so many variables.

This is a mathematical "chaos". But chaos is a recurring element and entity in the series. Back in the 90s the idea of chaos was surely influencing a lot of media, including FF8. But what is the "chaos" in FF8? Is there a system of control going out of control?
Well, it does have a sort of time travel plot. Certainly small changes to the past would have a drastic impact on the future.