Complex sentence: The song's title and theme was mainly inspired by the butterfly effect of chaos theory, describing how even the smallest change in present conditions, like the flapping of a butterfly's wings, can cause a chain reaction and have a significant effect in the future.
Split into simpler sentences: The song's title and theme were mainly inspired by the butterfly effect of chaos theory. The theory describes how even the smallest change in present conditions, like the flapping of a butterfly's wings, can cause a chain reaction and have a significant effect in the future.