-Joseph G. Lehman
(Cross-posted from the MC, the Mackinac Center blog.)
Yesterday on his Fox television show, Glenn Beck described public policy changes along a spectrum from right to left, dubbing the range of current policies "the Overton Window." He borrowed the term my colleagues and I gave to a theory of change developed by the Mackinac Center's late vice president, Joseph Overton. When Joe died in 2003, I built a presentation around his idea, and I still use it to show how think tanks can shift public policy.