Sometime this fall, the board of the John M. Olin Foundation will meet one last time and approve a final round of grants. By the end of the year, the foundation will release its staff and close its office. There will be a few checks to write in 2006, and perhaps several more as late as 2007 or even 2008. But for all practical purposes, the foundation will shut down — and one of the conservative movement’s most important institutions will cease to exist.Tonight, in New York City, the Philanthropy Roundtable will host an event honoring the achievements of the...