Gonzales v. Oregon
Their ruling in Gonzales showed the states that the Supreme Court would not stop them from making physician-assisted suicide legal.  As of 2016, four more states have made physician-assisted suicide legal: Washington, Montana, Vermont, and California.  Now physician-assisted suicide is legal in five states  10% of the states in the country.  If the Supreme Court had made a different ruling in Gonzales, this never would have been possible.