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September 12, 2026Short & citedBlog
Civic Viewpoint.
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Civic Brief • Domestic Terrorism

Ted Kaczynski

Ted Kaczynski was an American mathematician and domestic terrorist known as the Unabomber.

Updated September 12, 20261 min readCited sources

Between 1978 and 1995, he carried out a nationwide mail bombing campaign that killed three people and injured 23 others.

What it is

Ted Kaczynski, born in 1942 in Illinois, was a mathematics prodigy who earned a doctorate from the University of Michigan and briefly taught at UC Berkeley before retreating to a remote Montana cabin. From there, he conducted a 17-year mail bombing campaign targeting people he associated with modern technology.

Key details

His attacks killed three people and injured 23. After a long FBI investigation, he was identified and arrested in 1996. He pleaded guilty in 1998 and received a life sentence without parole. Kaczynski died in federal custody on June 10, 2023.

Why it matters

Kaczynski’s case remains a touchstone in North American discussions of domestic terrorism and radicalization. His crimes and the FBI’s response were widely reported in Canada, and the broader security implications continue to inform policy debates.

In short

  • He was a mathematics prodigy who became a domestic terrorist.
  • His bombing campaign spanned 17 years, killing three and injuring 23.
  • He was sentenced to life in prison without parole.
  • He died in federal custody in 2023.
Canadian angle

Kaczynski’s crimes and the FBI investigation were widely reported in Canada and remain part of North American discussions of domestic terrorism, radicalization, and security policy.

Quick questions

Who was Ted Kaczynski?
Ted Kaczynski was an American mathematician and domestic terrorist known as the Unabomber.
Why was he called the Unabomber?
The nickname came from the FBI code name for the investigation into his mail bomb attacks.
How many people did he kill and injure?
His bombing campaign killed three people and injured 23 others.

Sources

  1. Wikipediahttps://en.wikipedia.org/wiki/Ted_Kaczynski
    Supports: Birth and death dates, biography, bombing campaign, arrest, sentence, and nickname.
  2. Encyclopaedia Britannicahttps://www.britannica.com/summary/Ted-Kaczynski
    Supports: Education, academic career, Montana retreat, bombing campaign, manifesto, arrest, and life sentence.
  3. Federal Bureau of Investigationhttps://www.fbi.gov/history/famous-cases/unabomber
    Supports: FBI investigation timeline, bombing campaign, casualties, and arrest.
  4. Biography.comhttps://www.biography.com/crime/ted-kaczynski
    Supports: Academic background, bombing campaign, manifesto, arrest, imprisonment, and death.