Joseph L. Rauh Jr., 81, a prominent lawyer and founder of Americans for Democratic Action (ADA) who often championed civil liberties causes, died Thursday night in a Washington hospital after suffering a massive heart attack. In 1946, he was one of a small group of people who proposed the anti-Communist but liberal organization that became the ADA. The Harvard-trained lawyer was the ADA national chairman from 1955 to 1957 and was on the executive board of the NAACP. In addition, he was the partner of Clarence Mitchell when the two served as co-chairmen of the Leadership Conference on Civil Rights.

