1994 Oregon Ballot Measure 16
The Death with Dignity Act made Oregon the first state in the United States to made physician-assisted suicide legal.  The law survived many legal challenges.  The Attorney General of the United States even tried to stop the law.  However, in 2006, in a case called Gonzales v. Oregon, the Supreme Court of the United States ruled that Oregon could continue to use the Death with Dignity Act.  Over the next ten years, four more states made physician-assisted suicide legal for terminally ill people.