Civil resistance is a form of political action that relies on the use of nonviolent resistance by ordinary people to challenge a particular power, force, policy or regime. Civil resistance operates through appeals to the adversary, pressure and coercion: it can involve systematic attempts to undermine or expose the adversary's sources of power. Forms of action have included demonstrations, vigils and petitions; strikes, go-slows, boycotts and emigration movements; and sit-ins, occupations, constructive program, and the creation of parallel institutions of government.