The publication of An Inquiry into the Human Mind: on the Principles of Common Sense in 1764 marked a turning point in the intellectual history of the United Kingdom. Thomas Reid, a Protestant minister turned academic, challenged established skeptical traditions by proposing that common sense serves as the essential bedrock for all rational thought, perception, and human belief.
Early Life and Academic Formation
Born in 1710 in the manse at Strachan, Thomas Reid pursued his early education at Kincardine Parish School and O'Neil Grammar School. He matriculated at Marischal College in 1723, graduating with an M.A. in 1726. Although he was licensed to preach by the Church of Scotland in 1731, his career trajectory shifted significantly in 1752 when he accepted a professorship at King's College, Aberdeen. During this period, he co-founded the Aberdeen Philosophical Society, locally recognized as the 'Wise Club', which fostered rigorous literary and philosophical discourse.
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Reid established the movement known as Scottish Common Sense Realism, positioning himself as a primary critic of David Hume. While Hume and other early modern figures argued that knowledge was restricted to mental ideas, Reid asserted that the structure of the human mind necessitates a belief in an external world. He argued that philosophical inquiry requires an implicit agreement on foundational first principles, such as the existence of external objects and the reliability of sensory input. For Reid, rejecting these principles was incompatible with rational debate.
Career at the University of Glasgow
In 1764, Reid succeeded Adam Smith as the Professor of Moral Philosophy at the University of Glasgow. He held this chair until his resignation in 1781. During his tenure and subsequent retirement, he codified his lectures into two major volumes: Essays on the Intellectual Powers of Man, published in 1785, and Essays on the Active Powers of the Human Mind, released in 1788. These works addressed ethics, the nature of free will, and the behavioral tendencies of the mind, bridging the gap between epistemology and practical conduct.
Legacy and Institutional Contribution
Beyond his writing, Reid contributed to the formalization of academic life in Scotland. In 1783, he became a joint founder of the Royal Society of Edinburgh. His influence remained prominent well into the 19th century, often overshadowing his contemporaries in terms of institutional impact. Reid died in 1796 in Glasgow, where he was interred at Blackfriars Church. His contributions to metaphysics and ethics continue to inform the study of moral philosophy and theory of action.
Fast facts
- Born: 1710, Strachan, United Kingdom
- Died: 1796, Glasgow
- Fields: Ethics, Metaphysics
- Academic Degree: Professor
- Notable Works: Essays on the Intellectual Powers of Man (1785), Essays on the Active Powers of the Human Mind (1788)
- Awards: Fellow of the Royal Society of Edinburgh (1783)
- Citizenship: Kingdom of Great Britain
- Movement: Scottish Common Sense Realism
Questions readers ask
What was Thomas Reid's primary critique of David Hume?
Reid rejected Hume's skepticism regarding the external world, arguing that the mind possesses inherent principles of common sense that make belief in reality a necessary foundation for all reason.
What subjects did Reid cover in his later essays?
His 1788 work, Essays on the Active Powers of the Human Mind, focused on human behavior, free will, and the ethical principles governing moral decision-making.
Achievements
- Notable work: An Inquiry into the Human Mind: on the Principles of Common Sense
- Notable work: Essays on the Intellectual Powers of Man
- Notable work: Essays on the Active Powers of the Human Mind
- Held posts at University of Aberdeen and University of Glasgow
- Fields: metaphysics and ethics

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