System thinking is goal-oriented: there are always pre-defined goals and objectives, which system must achieve, and there are always prescribed requirements and criteria, which system must satisfy. As the achievement of any goal happens always in the future, system thinking is obsessed with prediction and generating plans, blueprints, time-schedules and scenarios.
Complexity and chaos focus their attention on the present, because even tiny perturbations in the process of self-organization occurring at present can have enormous impact on the further development of this process. It is an impossible task to make the ‘butterfly effect’ follow any goal-oriented strategy and any targets’ setting anchored in the future.
Source: Complexity, Chaos and Creativity: A Journey beyond System Thinking (Dr. Vladimir Dimitrov)