42 U.S.C. § 1983 is a federal law that allows people to sue state or local government actors who, under the color of law, violate another person’s constitutional rights. (The key phrase is “under the color of law,” which means pretending to, or falsely appearing to, act within governmental authority.)
A state governor issues an order segregating the state government based on race. People affected by the order may sue the governor under 42 U.S.C. § 1983.
A U.S. senator suspects that his wife is cheating on him with a journalist. The senator uses law enforcement to spy on the journalist. Police officers illegally search the journalist’s home, computer, and mail. The journalist may sue the police officers and the senator under 42 U.S.C. § 1983 for violating his Fourth Amendment rights.
42 U.S.C. § 1983 was signed into law by President Ulysses S. Grant in 1871 to fight the Ku Klux Klan. The KKK had killed thousands of people, mostly former slaves, in a reign of terror intended to restore white supremacy in the South. Disturbed by the violence, Grant personally walked from the White House to Congress to ask the legislative branch to act. The result was the Civil Rights Act of 1871, which included 42 U.S.C. § 1983. Using the bill, the federal government temporarily eliminated the KKK; the organization didn’t return until 1915. While other parts of the 1871 Civil Rights Act were struck down by the Supreme Court, 42 U.S.C. § 1983 remains on the books.
For more detailed information, see our related Constitutional Law terms: