 Theodore John " Ted " Kaczynski ( / kəˈzɪnski / ; born May 22 , 1942 ) , also known as the " Unabomber " , is an American domestic terrorist , anarchist , and mathematical prodigy . Between 1978 and 1995 , Kaczynski engaged in a nationwide bombing campaign against people involved with modern technology , planting or mailing numerous homemade bombs , ultimately killing a total of three people and injuring 23 others . He is also known for his wide @-@ ranging social critiques , which opposed industrialization and modern technology while advancing a nature @-@ centered form of anarchism . 
