Worrying about things outside your control is wasted energy

Focus on fixing the things you have an influence on and stop there, when the rest is up to fate.

This doesn't mean that you shouldn't tackle bigger things. Don't be intimidated by complex system.

About how stoics see control: 202105101033 The Stoic Trichotomy of Control About complex systems: 202111022346 An overly simple definition of complexity according to systems theory