After leaving office, Taft returned to Yale as a professor, continuing his political activity and working against war through the League to Enforce Peace. In 1921, Harding appointed Taft chief justice, an office he had long sought. Chief Justice Taft was a conservative on business issues and under him there were advances in individual rights. In poor health, he resigned in February 1930, and died the following month. He was buried at Arlington National Cemetery, the first president and first Supreme Court justice to be interred there. Taft is generally listed near the middle in historians' rankings of U.S. presidents.