Somewhat like Amnesty International begins more and more taking place, but here by forcing governments to stop war.
Go to Ceasefire Campaign and follow the indicated steps to act for stopping a possible war with Iran.
About CeasefireCampaign.org: The Ceasefire Campaign began when 300,000 individuals from over 150 countries came together to demand a ceasefire in Lebanon. The campaign is a project of Res Publica, a global civic advocacy group and registered charitable organization based in New York City. Please write by email.
And visit the Res Publica.org-website for more information.