  Divergent cumulative cultural evolution occurs when the cultural evolutionary
trajectory diverges from the biological evolutionary trajectory. We consider
the conditions under which divergent cumulative cultural evolution can occur.
We hypothesize that two conditions are necessary. First that genetic and
cultural information are stored separately in the agent. Second cultural
information must be transferred horizontally between agents of different
generations. We implement a model with these properties and show evidence of
divergent cultural evolution under both cooperative and competitive selection
pressures.
