High Quality Content by WIKIPEDIA articles! Robert "Bob" Curtis Clark (born July 2, 1937 in Acme, Alberta, Canada) is a former teacher, civil servant and provincial level politician. He served as a member of the Legislative Assembly of Alberta from 1960 to 1981. During his career he served as Leader of the Alberta Social Credit Party and Leader of the Official Opposition. After his provincial political career, he served as the Alberta Ethics Commissioner from April 1, 1992 to March 31, 2003.