Jane Jacobs (née Butzner; 4 May 1916 – 25 April 2006) was an American-Canadian journalist, author, theorist, and activist who influenced urban studies, sociology, and economics. Her book The Death and Life of Great American Cities (1961) argued that "urban renewal" and "slum clearance" did not respect the needs of city-dwellers.
Jacobs organized grassroots efforts to protect neighborhoods from urban renewal and slum clearance – in particular plans by Robert Moses to overhaul her own Greenwich Village neighborhood. She was instrumental in the eventual cancellation of the Lower Manhattan Expressway, which would have passed directly through the area of Manhattan that would later become known as SoHo, as well as part of Little Italy and Chinatown. She was arrested in 1968 for inciting a crowd at a public hearing on that project. After moving to Toronto in 1968, she joined the opposition to the Spadina Expressway and the associated network of expressways in Toronto that were planned and under construction.
As a woman and a writer who criticized experts in the male-dominated field of urban planning, Jacobs endured scorn from established figures. Routinely, she was described first as a housewife, as she did not have a college degree or any formal training in urban planning; as a result, her lack of credentials was seized upon as grounds for criticism. However, the influence of her concepts eventually was acknowledged by highly respected professionals such as Richard Florida and Robert Lucas.
Jacobs was born Jane Isabel Butzner in Scranton, Pennsylvania, the daughter of Bess Robison Butzner, a former teacher and nurse, and John Decker Butzner, a physician. They were a Protestant family. Her brother, John Decker Butzner, Jr., served as a judge on the United States Court of Appeals for the Fourth Circuit. After graduation from Scranton High School, she worked for a year as the unpaid assistant to the women's page editor at the Scranton Tribune.
In 1935, during the Great Depression, she moved to New York City with her sister Betty.