Notes:

"Much like the bombings this month in Austin, Texas, which police said had increased in sophistication, the explosives for which Kaczynski was blamed were described in the same way. Kaczynski's motive for the bombings apparently stemmed from his belief that technology was mankind's undoing, which led him to target university professors and computer stores. He was eventually caught after he sent a letter to The Washington Post and The New York Times under an alias. In the letter, he threatened that the bombings would continue unless the newspapers published his manifesto. After it was printed, Kaczynski's younger brother notified authorities after noticing similarities between it and Kaczynski's previous writing. Kaczynski was arrested in 1996 and pleaded guilty in exchange for a life sentence." – http://www.businessinsider.de/austin-texas-package-bombs-unabomber-similarities-2018-3?r=US&IR=T

"Theodore John Kaczynski (/kəˈzɪnski/; born May 22, 1942), also known as the Unabomber, is an American domestic terrorist. A mathematics prodigy, he abandoned an academic career in 1969 to pursue a primitive lifestyle, then between 1978 and 1995 he killed three people, and injured 23 others, in a nationwide bombing campaign targeting those involved with modern technology. In conjunction, he issued a social critique opposing industrialization and advancing a nature-centered form of anarchism." – https://en.m.wikipedia.org/wiki/Ted_Kaczynski

Ted Kaczynski's Manifesto: http://www.washingtonpost.com/wp-srv/national/longterm/unabomber/manifesto.text.htm

Past serial bombers: https://www.npr.org/2018/03/21/595225573/from-unabomber-to-mad-bomber-a-look-at-past-serial-bombers