WorkHerbert Spencer

The Principles of Psychology

The mind treated as an evolved organ four years before Darwin published — and the settlement he offered to a century-old quarrel about innate ideas.

by Herbert Spencer757 passages held

English, the original language, and your language

First published: 1855(aged 35)
Original language: English

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Overview

Writing it broke him. He collapsed in 1855, while the book was still being written, and never recovered: insomnia for the rest of his life, a few usable working hours a day for another half-century, and a good deal of opium. He could not even finish the summing-up the book was supposed to end with, and the volume Longman published that year stops without it. What he did finish is the first sustained attempt to treat mind as something that evolved. Life, on Spencer's definition, is the continuous adjustment of internal relations to external relations, and intelligence is that adjustment become elaborate — reflex, instinct, memory, reason and feeling differing in degree rather than in kind, each a longer or more complicated correspondence with the world outside. From this he offered a settlement of the quarrel that had occupied British philosophy for a century. The empiricists said the mind begins as a blank and experience writes on it; their opponents said its basic forms are given in advance and cannot be got from experience. Both are right, Spencer answered, if the experience belongs to the ancestors: what is inborn in one person is the deposited learning of the race, laid down in inherited nervous structure. All of it was in print four years before The Origin of Species. It sold badly, far worse than his first book, and the argument reached anyone at all only later, when a much enlarged two-volume edition appeared in 1870–72 and took its place inside the system of philosophy he had by then begun. Inherited acquired experience is not how psychology now explains an inborn capacity. What survived is the demand itself: that mind be given a natural history rather than taken as a given.

Key concepts

What does Spencer mean by correspondence between inner and outer relations?

Correspondence is the fit between an organism’s internal relations and the external relations it must meet. A reflex registers one relation; memory preserves a previous one; reasoning coordinates many relations at once. Spencer therefore treats intelligence as an expanded correspondence, not as a faculty detached from biology. The mind knows by adjusting its states to what surrounds it.

Why does Spencer call inborn mental structure inherited experience?

He calls an inborn capacity inherited experience because ancestral adjustments, accumulated across generations, become part of a descendant’s nervous organization. What feels immediate to one person therefore has a history in the race, even though that person did not learn it. This claim let Spencer join empiricism’s emphasis on experience to nativism’s fact of birth. It also makes heredity carry the argument.

Does Spencer treat reason as different from reflex and instinct?

Spencer places reflex, instinct, memory, reason, and feeling on one developmental scale rather than treating them as separate kinds of mind. They differ in the length and complexity of the correspondence they achieve: a reflex handles an immediate relation, while reason coordinates relations across time. Feeling belongs in the same natural history. It is not an exception to evolution.

Why does Spencer define life as adjustment rather than mere activity?

Life, for Spencer, consists in the continuous adjustment of internal relations to external relations. An organism remains alive by keeping its internal arrangements responsive to changing conditions, and intelligence extends that work into increasingly elaborate forms. This definition makes psychology part of biology rather than a study of an immaterial faculty. Adjustment does the explanatory work.

How does this psychology answer the empiricist and nativist dispute?

Spencer answers the dispute by assigning truth to both sides at different levels. Experience writes on the mind, as the empiricists claimed, but the individual inherits structures formed by the experience of ancestors, as the opposing school insisted. The proposal appeared in 1855, four years before Darwin’s Origin of Species. Its mechanism is no longer accepted, but its historical demand remains: explain mental capacities through natural history.

Themes of the book

What this book returns to, gathered into themes and ordered by how much of the text each one occupies.

Mind as Evolved Correspondence

Can the mind be explained as something that grew through life’s adjustments rather than assumed as a starting point? The answer decides whether psychology belongs to natural history—and how innate knowledge should be understood.

Spencer treats mind as a history of adjustments, not a faculty dropped into the body complete. In the 1855 volume, reflex, instinct, memory, reason, and feeling differ by the length and complexity of their correspondence with the external world. Against empiricism and theories of fixed innate forms, he argues that inherited capacities preserve the experience of ancestors in nervous structure. The claim appeared four years before Darwin’s Origin of Species, though its account of inherited acquired experience no longer explains innateness.

evolution
biology
epistemology
cognition
adaptation
psychology
physiology
perception
consciousness

Enter a dialogue

Within this work

passages held: 757
distinct concepts: 908
by passages held, corpus-wide: #30

What this book thinks together

Every arc around the wheel is one concept in this book. A ribbon joins two the text reaches for together, and its width is how many of its passages hold both. Strongest: epistemology with logic.

Concept co-occurrence, strongest first 8 concepts, joined by 13 pairings. 182 shared passages in all. 87 weaker pairings reach beyond these concepts and are not drawn.
Concept	Paired concept	Shared passages
epistemology	logic	41
biology	evolution	23
adaptation	evolution	21
ethics	evolution	17
cognition	logic	16
cognition	epistemology	15
altruism	ethics	12
adaptation	biology	9
ethics	logic	7
adaptation	ethics	6
biology	ethics	6
epistemology	ethics	5
cognition	evolution	4

Works held

The author's work in order, this book marked in place. Your-language title first, the original beneath it where the two differ; side chips show which full texts are held.

1850 The Right to Ignore the State
Nowhere else did his individualism go so far in print. A chapter rather than a book — which is why it now travels without the treatise that produced it.
EN
1851 Social Statics
His first book fixed the political position he defended for the next half-century, and the evolutionary reasoning he tried out here on the poor law grew into a philosophy of the universe.
EN
1852 The Philosophy of Style
It sits between his first book and the psychology that broke his health, and it is a single essay of October 1852, printed in a quarterly.
EN
1855 The Principles of Psychology you are here EN
1858 Essays: Scientific, Political and Speculative
Read against the Synthetic Philosophy, this is where several of its positions were first stated at magazine length — and where he wrote about music, manners and laughter, which the system had no room for.
EN
1861 Essays on Education and Kindred Subjects
The essays are of the 1850s; the book is of 1911, and Charles W. Eliot, not Spencer, chose its contents — the four on education, set beside pieces on progress, science, manners, laughter and music.
EN
1862 First Principles
Everything else in the Synthetic Philosophy was written to demonstrate the formula set out here, and every later volume argues back to it. Spencer issued it first, when none of what it was meant to govern had yet been written.
EN
1864 Illustrations of Universal Progress: A Series of Discussions
Assembled for America out of the same magazine pieces Spencer was collecting at home in his own Essays, with which it overlaps heavily. It was often the first Spencer an American reader owned.
EN
1873 The Study of Sociology
It stands in front of the three volumes of the sociology as their introduction, arguing that the science is difficult before any of it was attempted. Much the shortest of his sociological writing.
EN
1876 The Principles of Sociology
Three volumes over twenty years, resting on an apparatus Spencer had to build and pay for before he could write them: the Descriptive Sociology tables, which he abandoned before the last volume appeared.
EN
1879 The Data of Ethics
Ethics was where the whole system was meant to arrive, and this is its opening division — issued alone, ahead of the volumes it was supposed to rest on, and later bound in as Part I of The Principles of Ethics.
EN
1886 The Factors of Organic Evolution
Late, and on its own, it argues directly for the mechanism his psychology, his ethics and his sociology all quietly depend on.
EN

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