How a notorious far right organization set the Republican Party on a long march toward extremism At the height of the John Birch Society's activity in the 1960s, critics dismissed its members as a paranoid fringe. After all, "Birchers" believed that a vast communist conspiracy existed in America and posed an existential threat to Christianity, capitalism, and freedom. But as historian Matthew Dallek reveals, the Birch Society's extremism remade American...