The Biocomplexity Institute at Indiana University defines biocomplexity as “the study of the emergence of self-organized, complex behaviors from the interaction of many simple agents.

In Simon’s language, an entity is complex if it is composed of a number of components that interact in a non-trivial (that is, non-obvious) way.

New strategies, new things are coming and going and striving to survive and do well in a situation they mutually create. We can describe this algorithmically, but not easily by equations, not just because the situation is complicated to track but because new behaviors and categories of behavior are not easily captured by equations.