The government is emergent behavior of evolutionary pressures.

For most of human history, war of aggression was a matter of a cost-benefit analysis which often have more benefit than cost. That has changed (relatively) recently because of how destructive it is that even the winner does not gain from it.

Point being, hierarchical authoritarian structures are very good at war (and other kinds of competition). That's why they exist. But they should no longer be needed.

They are entrenched and we need to evolve away from them.