Historic moment as Jackson’s unanimous opinion addresses state dispute over unclaimed funds.

Justice Ketanji Brown Jackson has made history by writing her first majority opinion for the Supreme Court. Released on Tuesday, the opinion addresses a dispute between states regarding unclaimed money and is one of several she is expected to write before the court concludes its session in late June. While the decision was unanimous, not all justices signed on to the entire opinion.

Typically, each justice authors at least one opinion from the court’s seven separate two-week argument sessions running from early October to late April. However, due to a limited number of argued cases—only seven in January and February—there aren’t always enough cases for every justice to write an opinion.

Justice Jackson joined the Supreme Court on June 30, following the retirement of Justice Stephen Breyer. At 52, she is the first Black woman to serve as a justice and only the third Black person to hold this position, alongside Justice Clarence Thomas and the late Justice Thurgood Marshall.

Previously, Jackson authored her first dissenting opinion in November, supporting death row inmate Davel Chinn, who sought Supreme Court review of his case. Jackson argued that the state had suppressed evidence that could have influenced the trial’s outcome, and she expressed her belief that lower courts should reconsider the case. Only Justice Sonia Sotomayor joined her in that opinion.