This is a brief biographical sketch of one of the great leaders of the Scottish Presbyterian Church. Thomas Chalmers (1780-1847) became an outstanding evangelical preacher in the first half of the 19th century. Besides this he was an able mathematician, scientist, social reformer, moral philosopher and theologian. He was a leader of the evangelicals in the years leading up to the 'Disruption' of 1843 when about a third of the ministers and people...