Berk describes this well on p. 27-29, 32. So, the same experience can set into motion very different events depending on the story that gets told about it. See Bee, Chapter 1. Opposes Erikson's developmental model. The job of educators and caretakers is thus to provide many opportunities for success, but to hold off on dictating a specific path.
Human beings are definitely complex systems.
Dynamical systems theory originated among mathematicians and physicists.