Upton Beall Sinclair Jr. (1878–1968) was an American author, muckraker, and political activist known for his nearly 100 books in various genres. Best known for his 1906 novel The Jungle, Sinclair exposed the deplorable conditions of the US meatpacking industry, sparking public outrage and leading to significant reforms, including the passage of the Pure Food and Drug Act and the Meat Inspection Act.
Born in Baltimore, Maryland, to Upton Beall Sinclair Sr. and Priscilla Harden Sinclair, his childhood was marked by financial instability and stark social contrasts. His father's alcoholism and lack of success contrasted sharply with his mother's strict religious views and the wealth of his maternal grandparents.
Upton Sinclair, who showed a precocious intellect, entered City College of New York at 14. He supported himself by writing and publishing dime novels, jokes, and adventure stories. Although he briefly attended Columbia University, his passion for literature eventually led him away from formal education.
Although his early novels were commercially unsuccessful, his investigative work in Chicago's meatpacking industry provided the basis for The Jungle, which became a sensation and remains a landmark in American literature.
A committed socialist, Sinclair's political activism extended beyond his writing. He founded the Intercollegiate Socialist Society and ran for political office several times, including a high-profile campaign as the Democratic nominee for governor of California in 1934.
His End Poverty in California (EPIC) movement proposed radical economic reforms, but it faced fierce opposition from conservative forces, Hollywood executives, and major newspapers. Although he lost the election, Sinclair's campaign reshaped the political discourse in the state.
Sinclair's literary career extended far beyond The Jungle. His 1919 expose, The Brass Check, criticised the limitations of American journalism and helped establish the first code of ethics for journalists. Other notable works include King Coal (1917), Oil! (1927) and The Flivver King (1937), all of which exposed industrial corruption and labour exploitation. The novel Oil! later inspired the acclaimed film There Will Be Blood (2007).
Throughout his life, Sinclair wrote extensively on politics, social justice and economic inequality. His efforts were recognised in 1943 when he won the Pulitzer Prize for Fiction for Dragon's Teeth, a novel about the rise of Nazism in Germany.
Despite his ideological convictions, Sinclair's views evolved, and he left the Socialist Party during World War I. However, he remained politically active, advocating civil liberties and founding the Southern California chapter of the American Civil Liberties Union.
Upton Sinclair married three times, with his second wife, Mary Craig Kimbrough, his partner for nearly five decades. He spent much of his later years in California and Arizona before dying in New Jersey in 1968.
He is buried in Rock Creek Cemetery in Washington, DC.