Alexander Bain (11 June 1818 – 18 September 1903) was a Scottish philosopher and educationalist in the British school of empiricism and a prominent and innovative figure in the fields of psychology, linguistics, logic, moral philosophy and education reform. He founded Mind, the first ever journal of psychology and analytical philosophy, and was the leading figure in establishing and applying the scientific method to psychology. Bain was the inaugural Regius Chair in Logic and Professor of Logic at the University of Aberdeen, where he also held Professorships in Moral Philosophy and English Literature and was twice elected Lord Rector of the University of Aberdeen.
Alexander Bain was born in Aberdeen, north Scotland, to George Bain, a weaver and veteran soldier, and Margaret Paul. At age eleven he left school to work as a weaver hence the description of him as Weevir, rex philosophorum. He also attended lectures at the Mechanics' Institutes of Aberdeen and the Aberdeen Public Library.
In 1836 he entered Marischal College where he came under the influence of Professor of Mathematics John Cruickshank, Professor of Chemistry Thomas Clark and Professor of Natural Philosophy William Knight. Towards the end of his undergraduate degree he became a contributor to the Westminster Review with his first article entitled "Electrotype and Daguerreotype," published in September 1840. This was the beginning of his connection with John Stuart Mill, which led to a lifelong friendship. He was awarded the Blue Ribbon and also the Gray Mathematical Bursary. His college career and studies were distinguished especially in mental philosophy, mathematics and physics and he graduated with a Master of Arts with Highest Honours.
In 1841, Bain substituted for Dr. Glennie the Professor of Moral Philosophy, who, due to ill-health, was unable to discharge his academic duties. He continued to do this three successive terms, during which he continued writing for the Westminster, and also helped John Stuart Mill with the revision of the manuscript of his System of Logic (1842).