The New York Review of Books: Isaiah Berlin's "On the Pursuit of the Ideal"
Read this article, which is meant to serve as a cautionary tale about the relationship between idealized pursuits and the protection of civil liberties.
Click http://web.archive.org/web/20160414223008/http://faculty.up.edu/asarnow/351/Berlin%20Pursuit%20of%20the%20Ideal.htm link to open resource.