"Political scientist Joseph Overton developed a concept in the 1990s that had a major influence on my views on and approach to building support for good urbanism. "The Overton window" refers to the range of ideas that are acceptable or mainstream in public discourse at a given time. The acceptable topics are shaped by public opinion, media coverage, influence of special interest groups, and actions of political leaders."
"Before the Overton window shifted, these opinions were considered outside the range of allowable opinion: The earth isn't flat, nor is it the center of the universe. Multiple nationalities will be taught in the same classroom. A computer will one day fit on your desk. Tiny germs exist that you can't see with your eyes. Human organs and limbs will be replaced. Art will be created by voice command."
The Overton window defines the range of ideas considered acceptable or mainstream in public discourse at a given time. Acceptable ideas are shaped by public opinion, media coverage, special interest influence, and political leadership. Ideas within the window are more likely to be debated, while those outside may be dismissed as extreme or fringe. The window shifts over time, allowing previously unacceptable ideas to become mainstream. Normalizing walk- and bike-friendly urbanism demands culture change and an advocacy long game that creates space for ideas that seem impossible today, including radical departures from normal planning exercises.
Read at Fast Company
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