At once a manifesto and an experiment, this 1895 treatise captures psychology at a moment when it was still finding its footing as a science. Hiram Miner Stanley sets out to trace feeling not as an abstract philosophical category, but as something that evolved, that has history, that serves living organisms. He asks: what is the biological origin of pain and pleasure, and how does introspection confirm or complicate this story? The result is a series of studies that feel startlingly modern in their willingness to sit with uncertainty. Stanley admits freely that he traverses moot points, that psychology in 1895 had no unified vocabulary for these matters. What emerges is a portrait of a young discipline reaching toward evolutionary biology for answers, before Freud, before behaviorism, before the various schools that would fragment the field. For readers curious about where psychology came from, this is a window into its formative years, when the very questions we still ask about emotion, embodiment, and mind were being framed for the first time.
