Illinois became the first state in the U.S. to get rid of its sodomy law. It did so in 1961, when it adopted an overall revision of its criminal laws. The revision closely followed the 1955 recommendations of the American Law Institute, a group of distinguished lawyers and law professors. Idaho passed a similar revision, but when the legislature discovered it had repealed the sodomy law, it repealed the entire reform package instead.
Connecticut followed Illinois’ lead in 1971 and 19 more states (CT, CO, CA, DE, HI, IN, IO, ME, NE, NJ, NM, ND, OH, OR, SD, VT, WA, WV, WY) repealed their sodomy laws in the 1970s. Most did it as part of a general reform of criminal laws. California, which had a six year fight over repeal of the sodomy law, was an exception. California’s repeal finally passed in 1975 after a dramatic tie vote in the state Senate, where majority leader George Moscone kept the vote open and the Senate in session while a private plane could be dispatched to bring back the Lt. Governor. He cast the tie breaking vote. Moscone, later elected mayor of San Francisco, was assassinated in 1978 with Harvey Milk.
Source: ACLU
In 1973, the American Psychiatric Association voted to remove homosexuality from the the list of mental illnesses described in the Diagnostic and Statistic Manual. This landmark vote started a shift in thinking about gay people and was the foundation for decriminalizing consensual same-sex sexual acts.
Georgia was one of the states that continued to enforce its sodomy laws. The case began in August 1982, when Atlanta police arrived at the residence of Michael Hardwick to arrest him for failing to appear in court on charges of public drinking. A roommate let the police into Hardwick's home. As the police searched for Hardwick in the house, they noticed a door partly open. Peering in, they found Hardwick and a male companion engaged in oral sex. Hardwick and his partner were arrested on charges of violating the Georgia Sodomy Statute, which stated that "a person commits the offense of sodomy when he performs or submits to any sexual act involving the sex organs of one person and the mouth or anus of another" and "a person convicted of the offense of sodomy shall be punished by imprisonment for not less than one nor more than 20 years." Hardwick sued the state of Georgia, claiming that the sodomy statute violated the Constitution. After Hardwick prevailed in a federal appellate court, Georgia appealed to the U.S. Supreme Court, which reviewed the case in 1986.
In September of 1998, when police responded to reports of someone brandishing a gun in the Harris County, Texas apartment of John Lawrence. Upon entering the apartment, they discovered Lawrence having sex with another man and arrested him under Texas’ “Homosexual Conduct” law, which barred “deviate sexual intercourse with another individual of the same sex.”
Five years later, the Supreme Court heard the case. Lawyers for the State of Texas tried to draw a distinction between the privacy of “a marital bedroom” and the circumstances of the case, but the Court sided with Lawrence. In a 6-3 decision, it ruled that “The state cannot demean [anyone’s] existence or control their destiny by making their private sexual conduct a crime,” finding that the right to privacy that underpinned the 1973 Roe v. Wade decision also covered sex among consenting adults. Chief Justice William H. Rehnquist and Justices Antonin Scalia and Clarence Thomas dissented, with Scalia writing that “The court has largely signed on to the so-called homosexual agenda” and “taken sides in the culture war,” adding that he had “nothing against homosexuals.” Overnight, gay sex became legal in the United States, paving the way for further acceptance of homosexuality in the coming years.
Laws prohibiting consensual sex between people of the same gender still exist in 12 states. They are not enforeceable only because of this Supreme Court ruling. Should the Supreme Court reverse this decision, consensual sex between adults of the same gender will once again become illegal in those 12 states.