Theodore John Kaczynski ( k-ZIN-skee; born May 22, 1942), also known as the Unabomber (), is an American domestic terrorist and former mathematics professor. He was a mathematics prodigy, but abandoned his academic career in 1969 to pursue a primitive life. Between 1978 and 1995, he killed three people and injured 23 others in a nationwide bombing campaign against people he believed to be advancing modern technology and the destruction of the environment. He issued a social critique rejecting leftism, opposing industrialization and advocating a nature-centered form of anarchism.In 1971, Kaczynski moved to a remote cabin without electricity or running water near Lincoln, Montana, where he lived as a recluse while learning survival skills to become self-sufficient. He witnessed the destruction of the wilderness surrounding his cabin and concluded that living in nature was becoming impossible. He resolved to fight industrialization and its destruction of nature through terrorism, beginning his bombing campaign in 1978. In 1995, he sent a letter to The New York Times and promised to "desist from terrorism" if the Times or The Washington Post published his essay Industrial Society and Its Future, in which he argued that his bombings were extreme but necessary to attract attention to the erosion of human freedom and dignity by modern technologies that require mass organization.Kaczynski was the subject of the longest and most expensive investigation in the history of the Federal Bureau of Investigation up to that point. The FBI used the case identifier UNABOM (University and Airline Bomber) to refer to his case before his identity was known, which resulted in the media naming him the "Unabomber". The FBI and Attorney General Janet Reno pushed for the publication of Industrial Society and Its Future, which appeared in The Washington Post in September 1995. Upon reading the essay, Kaczynski's brother David recognized the prose style and reported his suspicions to the FBI. After his arrest in 1996, Kaczynskimaintaining that he was sanetried and failed to dismiss his court-appointed lawyers because they wanted him to plead insanity to avoid the death penalty. In 1998, a plea bargain was reached under which he pleaded guilty to all charges and was sentenced to eight consecutive life terms in prison without the possibility of parole.

Sacramento ( SAK-rə-MEN-toh; Spanish: [sakɾaˈmento], Spanish for ''sacrament'') is the capital city of the U.S. state of California and the seat and largest city of Sacramento County. Located at the confluence of the Sacramento and American Rivers in Northern California's Sacramento Valley, Sacramento's 2020 population of 524,943 makes it the sixth-largest city in California and the ninth-largest capital in the United States. Sacramento is the seat of the California Legislature and the Governor of California, making it the state's political center and a hub for lobbying and think tanks. It features the California State Capitol Museum.

Sacramento is also the cultural and economic core of the Greater Sacramento area, which at the 2020 census had a population of 2,397,382, the fifth-largest metropolitan area in California.Before the arrival of the Spanish, the area was inhabited by the historic Nisenan, Maidu, and other indigenous peoples of California. Spanish cavalryman Gabriel Moraga surveyed and named the Río del Santísimo Sacramento (Sacramento River) in 1808, after the Blessed Sacrament, referring to the Eucharist in the Catholic Church. In 1839, Juan Bautista Alvarado, Mexican governor of Alta California, granted the responsibility of colonizing the Sacramento Valley to Swiss-born Mexican citizen John Augustus Sutter, who subsequently established Sutter's Fort and the settlement at the Rancho Nueva Helvetia. Following the American Conquest of California and the 1848 Treaty of Guadalupe-Hidalgo, the waterfront developed by Sutter began to be developed, and incorporated in 1850 as the City of Sacramento.

Sacramento is the fastest-growing major city in California, owing to its status as a notable political center on the West Coast and as a major educational hub, home of California State University, Sacramento and University of California, Davis. Similarly, Sacramento is a major center for the California healthcare industry, as the seat of Sutter Health, the world-renowned UC Davis Medical Center, and the UC Davis School of Medicine. It is a tourist destination, featuring the California Museum, Crocker Art Museum, California State Railroad Museum, California Hall of Fame, and Old Sacramento State Historic Park. Sacramento International Airport, located northwest of the city, is the city's major airport.

Sacramento is known for its evolving contemporary culture, and is dubbed the most "hipster city" in California. In 2002, the Harvard University Civil Rights Project conducted for Time magazine ranked Sacramento as "America's Most Diverse City".