Sir Robert Sangster Rait CBE DL (February 10, 1874 - May 25, 1936) was a Scottish historian, Historiographer Royal, and University of Glasgow Principal. Rait was born in 1874 in Narborough, Leicestershire, to Scottish parents, but the family soon relocated to Aberdeen, his parents' homeland. He attended the University of Aberdeen, where he earned an MA in 1894. He subsequently worked briefly as an assistant to the Professor of Logic at the university before being chosen to an Exhibition in Modern History at New College, Oxford, in 1896. His first publication, Universities of Aberdeen: A History, was published in 1895. The following year, he received First Class Honours, the Stanhope Prize, and was made a fellow of the college. He was a lecturer at the institution for three years before becoming a tutor in 1903.