Complexity describes a state to a system that has evolved to be both differentiated and integrated. Systems that are complex have the properties of; numerosicity, meaning they have many parts; autonomy, meaning their parts are autonomous; high degrees of interconnectivity; and a high degree of interdependency between their parts. These properties then give rise to certain characteristics that are the result of complexity, such as nonlinearity, self-organization, emergent behavour and evolution.
