Theodore John "Ted" Kaczynski (; born May 22, 1942), also known as the "Unabomber", is an American anarchist and serial killer. 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.