Alexander Sutherland Neil(17 October 1883 – 23 September 1973) was a Scottish progressive educator, author and founder of Summerhill school, which remains open and continues to follow his educational philosophy to this day. He is best known as an advocate of personal freedom for children. Neill was born in Forfar in the Scottish Lowlands, one of thirteen children. Both parents were schoolteachers. After acting as a pupil-teacher for his father, he studied at the University of Edinburgh and obtained an M.A. degree in 1912. In 1914 he became headmaster of the Gretna Green School in Scotland. During this period, he described himself as "just enough of a Nietzschian to protest against teaching children to be meek and lowly" and wrote (in A Dominie's Log) that he was "trying to form minds that will question and destroy and rebuild". Maria Montessori was also an influence, as were Sigmund Freud and Wilhelm Reich.
In 1921 Neill left England for the Continent. In Hellerau near Dresden he visited Lilian Neustätter, whom he had met at King Alfred School and who later became his wife. In Hellerau, Neill, Lilian Neustätter and Christine Bear, who had studied with Émile Jaques-Dalcroze, founded the International School. This gave Neill the first opportunity to lead a school based on his own principles. Summerhill School arose out of the International School in Hellerau. It later moved to Sonntagberg in Austria, and in 1923 to Lyme Regis in England, where it acquired the name Summerhill. In 1927 it moved to its present site in Leiston, Suffolk. After Neill's death in 1973, the school was run by his wife Ena until 1985, then by his daughter Zoë Neill Readhead.