The Unabomber
Between 1978 and 1995, a domestic terrorist using package bombs and mail bombs killed three people and injured twenty-three others across the United States, targeting universities, airlines, and technology companies in a campaign that stretched nearly two decades without the perpetrator being identified. The FBI gave the case the designation UNABOM — for "University and Airline Bomber" — and the Unabomber became the subject of the longest and most expensive investigation in FBI history to that point, consuming tens of millions of dollars and involving hundreds of agents without producing a suspect. The break came in an unexpected form. In 1995, the Unabomber sent a 35,000-word manifesto — "Industrial Society and Its Future" — to the New York Times and Washington Post, demanding its publication in exchange for a halt to the bombings. After extensive debate, the newspapers published it. The gamble paid off: David Kaczynski recognized the writing style and ideas as those of his estranged brother, Theodore "Ted" Kaczynski, a former mathematics professor who had retreated to a remote Montana cabin. David contacted the FBI, and agents arrested Ted Kaczynski at his primitive one-room cabin in Lincoln, Montana in April 1996. Kaczynski was charged with multiple counts of murder and transport of explosive devices. Rather than face a death penalty trial in which his attorneys planned to present a mental illness defense — which Kaczynski himself rejected — he pleaded guilty in January 1998 to all federal charges, receiving eight life sentences without the possibility of parole. He refused to cooperate with psychological evaluations but was later diagnosed with paranoid schizophrenia by examining psychiatrists. Ted Kaczynski died by apparent suicide at the Federal Medical Center in Butner, North Carolina, in June 2023, at age eighty-one. His manifesto, despite its violent context, was taken seriously by some philosophers and environmentalists as a critique of industrial society and technological dependence. The Unabomber case reshaped the FBI's approach to anonymous mail and package threats, established protocols for manifesto analysis as an investigative tool, and remains one of the defining domestic terrorism cases of the late twentieth century.