at a certain point, the cohesive set of reciprocal causal relationships that form the system can rapidly become unraveled, and when that happens, the system undergoes what's known as a critical transition, leading to a new stable state that can be either more or less complex than the previous one. When this happens, it's very difficult for the system to shift back to the state it was in previously, a characteristic known as hysteresis.
Hysteresis. when the complexity is changed it can never go back
