The Overton window is the range of ideas the public will accept. It is used by media pundits and particularly favored in conservative and libertarian discourse.
The term derives from its originator, Joseph P. Overton (1960–2003), of the Mackinac Center for Public Policy, a free market think tank. Overton described six degrees acceptance of an idea: Unthinkable, Radical, Acceptable, Sensible, Popular, and Policy.
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