He became an assistant professor at the University of California , Berkeley at age twenty - five , but resigned two years later .
Kaczynski received an undergraduate degree from Harvard University and earned a PhD in mathematics from the University of Michigan .
Kaczynski became an assistant professor at the University of California , Berkeley at age twenty - five , but resigned two years later .
Kaczynski received an undergraduate degree from Harvard University and earned a PhD in mathematics from the University of Michigan .