A new idea fills the window of what the public regards as unthinkable, causing the desired idea to shift into the window of what the public views as sensible, w

A new idea fills the window of what the public regards as unthinkable, causing the desired idea to shift into the window of what the public views as sensible, without its proponents necessarily having explained any benefits of the desired idea. http://en.wikipedia.org/wiki/Overton_window http://en.wikipedia.org/wiki/Overton_window