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John Glas (born Sept. 21, 1695, Auchtermuchty, Fife, Scot.—died Nov. 2, 1773, Perth) was a Scottish Presbyterian clergyman denounced by his church for opposing the concept of a national religious establishment. He was the founder of the Glasites (Sandemanians, q.v.). Glas became minister of Tealing Church, Dundee, Angus, in 1719. Some of his parishioners led him to question the scriptural basis for the national Presbyterian Church to which he had been loyal, and he soon...