Inquiry into the Human Mind on the Principles of Common Sense

Thomas Reid's 1764 masterpiece is a frontal assault on modern philosophy's most seductive error: the assumption that we never directly perceive the world, only mental copies of it. In rigorous, accessible prose, Reid dismantles Locke's influential 'way of ideas,' demonstrating that our senses do not construct inner representations of reality but deliver immediate awareness of actual objects. Through careful analysis of perception, he shows that Locke's distinction between primary and secondary qualities collapses under scrutiny, and that we naturally and rightly believe in an external world that our senses directly reveal. This work founded Scottish Common Sense Realism, a philosophical movement that dominated Anglo-American thought for over a century and directly challenged the empiricist tradition that would culminate in Kant. It remains essential reading for anyone who has ever wondered whether the world we perceive is real, or merely a convenient fiction constructed by the mind.