Any processes or forces or dynamics or relationships which satisfy that simple definition, will qualify a system as complex . The forms will be different, with intricacies unique to each level, with openness to individual and even collective adaption into new complex configurations, yet the principle behaviors are shared, overshadowing any differences. It is driven by intimately and infinitely nested local entropies. Nested Cantorian Infinities. Form is transitory.
Options are what are important.
It is what remains, regardless of changes, regardless of relativity and alterations. Regardless of scale. The Integrity Paradigm is an umbrella concept, embracing all systems behaviors, translating all the diversity, distilling out shared qualities. It respects the integrity of individuation, but always places such identity in context with the universe abundantly around. Integrity reminds us that potential and opportunity are the most valuable commodities of existence.