Arguing that "it defies reason and experience to make Sept. 11 the defining influence on our foreign and domestic policy," Joseph Ellis dips into his textbooks to find historical analogues for our response to 9/11:

My list of precedents for the Patriot Act and government wiretapping of American citizens would include the Alien and Sedition Acts in 1798, which allowed the federal government to close newspapers and deport foreigners during the 'quasi-war' with France; the denial of habeas corpus during the Civil War, which permitted the pre-emptive arrest of suspected Southern sympathizers; the Red Scare of 1919, which emboldened the attorney general to round up leftist critics in the wake of the Russian Revolution; the internment of Japanese-Americans during World War II, which was justified on the grounds that their ancestry made them potential threats to national security; the McCarthy scare of the early 1950's, which used cold war anxieties to pursue a witch hunt against putative Communists in government, universities and the film industry.

In retrospect, none of these domestic responses to perceived national security threats looks justifiable. Every history textbook I know describes them as lamentable, excessive, even embarrassing. Some very distinguished American presidents, including John Adams, Abraham Lincoln and Franklin Roosevelt, succumbed to quite genuine and widespread popular fears. No historian or biographer has argued that these were their finest hours.