Thirty years ago, Ted Kaczynski—better known as the Unabomber—wrote Industrial Society and Its Future, a 35,000-word manifesto on the dangers of technology. He submitted it to The Washington Post and New York Times after an almost two-decade-long mail-bombing terror spree that left three people dead and 23 more injured. The FBI recommended its publication in the hopes that someone would recognize the writing. Someone did: his brother.