Here is a synopsis of the behavioral loop described above:
Step 1. Individuals and groups evolved a bias to maximize fitness by maximizing power, which requires over-reproduction and/or over-consumption of natural resources (overshoot), whenever systemic constraints allow it. Differential power generation and accumulation result in a hierarchical group structure.
Step 2. Energy is always limited, so overshoot eventually leads to decreasing power available to the group, with lower-ranking members suffering first.
Step 3. Diminishing power availability creates divisive subgroups within the original group. Low-rank members will form subgroups and coalitions to demand a greater share of power from higher-ranking individuals, who will resist by forming their own coalitions to maintain power.
Step 4. Violent social strife eventually occurs among subgroups who demand a greater share of the remaining power.
Step 5. The weakest subgroups (high or low rank) are either forced to disperse to a new territory, are killed, enslaved, or imprisoned.
Step 6. Go back to step 1.