Kaczynski was accepted into Harvard University at the age of 16, where he earned an undergraduate degree, and later earned a Ph D in mathematics from the University of Michigan.He became an assistant professor at the University of California, Berkeley at age 25 but resigned two years later.
In his Industrial Society and Its Future (also called the "Unabomber Manifesto"), he argued that his bombings were extreme but necessary to attract attention to the erosion of human freedom necessitated by modern technologies requiring large-scale organization.
The Unabomber was the target of one of the Federal Bureau of Investigation's (FBI) most costly investigations.
Instead they were subjected to a "purposely brutalizing psychological experiment" stress test, which was an extremely stressful, personal, and prolonged psychological attack.
During the test, students were taken into a room, strapped into a chair and connected to electrodes that monitored their physiological reactions, while facing bright lights and a two-way mirror.
With the help of a summer school course for English, he completed his high school education when he was 15 years old.
He was encouraged to apply to Harvard University, and was subsequently accepted as a student beginning in fall 1958 at the age of 16.
Kaczynski described this as a pivotal event in his life.
He recalled not fitting in with the older children and being subjected to their bullying.
From 1978 to 1995, Kaczynski sent 16 bombs to targets including universities and airlines, killing three people and injuring 23.
Kaczynski sent a letter to The New York Times on April 24, 1995 and promised "to desist from terrorism" if the Times or The Washington Post published his manifesto.
Instead, his brother recognized Kaczynski's style of writing and beliefs from the manifesto, and tipped off the FBI.