4 ideas
A former head of state arrives with bodyguards on a small, self-governing island of about forty households and finds the seagulls' noise intolerable. He persuades the residents to destroy the gulls, and the campaign gradually turns into the reorganization of island life around his will. The birds fight back, and the once-peaceful community fractures into factions and suspicion.
An aspiring strongman first mobilizes people against a target few will defend, here nuisance birds, so that complying feels like common-sense problem-solving rather than a political choice. Once residents have accepted that one kind of inhabitant can be eliminated for his comfort, the same logic of removal can be redirected at human dissenters with far less resistance.
Communities that govern themselves through informal consensus have no procedures for someone who ignores the consensus, so they fall back on deference. A person carrying the prestige and security apparatus of former power can dominate simply because residents treat his wishes as more weighty than their own. Politeness and conflict-avoidance become the openings through which control enters.
The ruler consolidates control less by direct force than by making residents fight one another. He sorts them into loyal and disloyal camps, rewards collaborators, and casts objectors as threats to the common good. Once neighbors distrust each other, collective resistance becomes impossible even when most privately oppose him.