Ted Kaczynski committed violent acts against his own country.
Domestic terrorism or homegrown terrorism is commonly associated with violent acts committed by citizens or permanent residents of a state against their own people or property within that state without foreign influence in an effort to instill fear on a population or government as a tactic designed to advance political , religious , or ideological objectives . Theodore John Kaczynski ( [ kəˈzɪnski ] born May 22 , 1942 ) , also known as the `` Unabomber '' , is an American serial killer , domestic terrorist , and self-professed anarchist . Seventeen years after beginning his mail bomb campaign , 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 , Industrial Society and Its Future ( the `` Unabomber Manifesto '' ) , in which 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 . He has been designated a `` domestic terrorist '' by the FBI .