 It developed "mostly in , Britain, and the United States, before and during the Second World War".Opposition to the use of violence has not prohibited anarcho-pacifists from accepting the principle of resistance or even revolutionary action, provided it does not result in violence; it was in fact their approval of such forms of opposition to power that lead many anarcho-pacifists to endorse the anarcho-syndicalist concept of the general strike as the great revolutionary weapon.Anarcho-pacifists have also come to endorse to non-violent strategy of dual power.