American judge
Source (Wikipedia): Benjamin Kaplan

Benjamin Kaplan was an American copyright and procedure scholar and jurist. He was also notable as “one of the principal architects” of the Nuremberg trials. And as Reporter to the U.S. Judicial Conference Advisory Committee on Civil Rules, he played a pivotal role in the 1966 revisions to Federal Rule of Civil Procedure 23, which transformed class action practice in the U.S.