Alternate timeline
(covers information from an alternate timeline)
Peace movement
A peace movement or pacifist movement was any political movement that involved bringing an end to war, with the goal of peace being the underlying achievement.
In an alternate timeline, the social worker Edith Keeler founded a peace movement.
This delayed the United States entry into World War II. Because of this, Germany developed the A-bomb first, and therefore the Nazis won the Second World War. (TOS: "The City on the Edge of Forever")