Why, for two hundred years, have some American citizens seen this country as an endangered Eden, to be purged of corrupting peoples or ideas by any means necessary? To the Know-Nothings of the 1850s, the enemy was Irish immigrants. To the Ku Klux Klan, it was Jews, blacks, and socialists. To groups like the Michigan Militia, the enemy is the government itself -- and some of them are willing to take arms against it.

"The Party of Fear" -- which has now been updated to examine the right-wing resurgence of the 1990s -- is the first book to reveal the common values and anxieties that lie beneath the seeming diversity of the far right. From the anti-Catholic riots that convulsed Philadelphia in 1845 to the 1995 bombing in Oklahoma City, it casts a brilliant, cautionary light not only on our political fringes but on the ways in which ordinary Americans define themselves and demonize outsiders.