On April 4, 1866, just as Alexander II stepped out of Saint Petersburg’s Summer Garden and onto the boulevard, a young man named Dmitry Karakozov pulled out a pistol and shot at the tsar. He missed, but his “unheard-of act” changed the course of Russian history—and gave birth to the revolutionary political violence known as terrorism. Based on clues pulled out of the pockets of Karakozov’s peasant disguise, investigators concluded that there had been a conspiracy so extensive as to have sprawled across the entirety of the Russian empire and the European continent. Karakozov was said to have been a member of “The Organization,” a socialist network at the center of which sat a secret cell of suicide-assassins: “Hell.” It is still unclear how much of this “conspiracy” theory was actually true, but of the thirty-six defendants who stood accused during what was Russia’s first modern political trial, all but a few were exiled to Siberia, and Karakozov himself was publicly hanged on September 3, 1866. Because Karakozov was decidedly strange, sick, and suicidal, his failed act of political violence has long been relegated to a footnote of Russian history.