ISAACS, NATHAN (1886–1941), U.S. lawyer, educator, and author. Isaacs taught law at the university of his native Cincinnati (1912–18; interrupted by service in the U.S. Army during World War i), at Harvard (1919–20 and from 1924) and at the University of Pittsburgh (1920–23). He also lectured at Yale Law School (1937–39). Isaacs was active in Jewish affairs and was an American delegate to the first World Jewish Congress in Geneva (1936). His books include The Law of Business Problems (1921, revised 1934), and Course in Business Law (1922). He coedited the National Law Library with Roscoe Pound (1939).