Overton Window

The Overton window is a political theory that describes as a narrow "window" the range of ideas that the public will find acceptable, and that states that the political viability of an idea is defined primarily by this rather than by politicians' individual preferences. It is named for its originator, Joseph P. Overton, a former vice president of the Mackinac Center for Public Policy. At any given moment, the “window” includes a range of policies considered politically acceptable in the current climate of public opinion, which a politician can recommend without being considered too extreme to gain or keep public office.