  The emergence of eusocial species is both very rare in evolutionary history
and results in remarkably successful species. By inverting an agent based
model, agent rules are discovered that display behaviors characteristic of
eusocial species as well as other behaviors that lead to unexpected population
dynamics. By holding the agents' genome constant across the colony and allowing
the agents' rules to evolve, the individual behaviors exhibit phenotypic
plasticity in response to environmental cues. The phenotypically driven
reduction of intrinsic growth rates and the emergence of non-reproducing
phenotypes both demonstrate selection pressure at the colony (system) level.
The efficiency of an evolved colony is shown to have a strong relationship to
the computational capacity of the agents. Various other emergent behaviors,
both eusocial and otherwise novel, are identified and discussed. A path forward
to more capable eusocial populations and inter-colony evolution is outlined.
