Theodore John "Ted" Kaczynski (born May 22, 1942 in Evergreen Park, Illinois) is an American mathematician and the Unabomber He was known as The Unabomber. Between 1978 and 1995, Kaczynski engaged in a nationwide bombing campaign against people involved with modern technology, planting or mailing numerous home-made bombs, ultimately killing a total of three people and injuring 23 others.