When Sagan and Ann Druyan visit Russia in “the closing years of the Soviet Union” (404), a Soviet novelist compliments Americans on their ability to maintain their freedom. Privately, Sagan isn’t so sure. Seven years after the Bill of Rights was signed in 1791, the ruling Federalist Party, riding a wave of anti-immigrant sentiment, subverted it with the Alien and Sedition Acts, which effectively allowed them to deny citizenship arbitrarily and imprison anyone who criticized the government. Thomas Jefferson, leader of the Democratic-Republican Party, upon seizing control at the next elections, purged the Alien and Sedition Acts from government policy, restoring fundamental freedoms to many Americans. Sagan views the Bill of Rights as a bulwark against such waves of tyranny and authoritarianism. He understands that when persecutory powers are strong, the people can lose their right to an opinion, and are swept up in the violent frenzies that overtake societies. The Bill of Rights is the major tool in keeping Americans free.

Sagan and Druyan examine the reporting of Friedrich von Spee, a Jesuit priest who witnessed the horrors of the witch trials in Germany in the 1600s. Von Spee recounts the self-confirming practices of the witch hunters, and the way paranoia spread through communities as accusations led to more accusations, until society was so riven by distrust and suspicion that even the original accusers were eventually consumed.