ice_, 1891); _Political
Institutions_, 1882. Meanwhile the following works were also published:
_The Classification of the Sciences_, 1864; _The Study of Sociology_,
1872; _Descriptive Sociology_, 1873; _The Man versus the State_, 1884;
_The Factors of Organic Evolution_, 1887; _The Inadequacy of Natural
Selection_, 1893. Spencer's _Autobiography_ appeared posthumously, 2
vols., 1904.

COLLECTED EDITION. Nineteen volumes, 1861-1902.

BIOGRAPHY AND CRITICISM. T. Funk-Brentano, _Les Sophistes grecs et les
Sophistes contemporains_ (Mill and Spencer), 1879; F.H. Collins, _An
Epitome of the Synthetic Philosophy_, 1889; H. Sidgwick, _Lectures on
the Ethics of Green, Spencer and Martineau_, 1902; 'The Philosophy of
Herbert Spencer' (in _The Philosophy of Kant and Other Lectures_, 1905);
D. Duncan, _An Introduction to the Philosophy of Spencer_, 1904; _Life
and Letters of Herbert Spencer_, 1908; J. Royce, _Herbert Spencer. An
Estimate and a Review_, 1904; J.A. Thomson, _Herbert Spencer_, 1906;
W.H. Hudson, _Herbert Spencer_, 1916; J. Rumney, _Herbert Spencer's
Sociology_, 1934; R.C.K. Ensor, _Some Reflections on Herbert Spencer's
Doctrine_, 1946.

CONTENTS

PAGE
_Introduction_ by Charles W. Eliot vii

PART I

EDUCATION: INTELLECTUAL, MORAL, AND PHYSICAL

WHAT KNOWLEDGE IS OF MOST WORTH? 1

INTELLECTUAL EDUCATION 45

MORAL EDUCATION 84

PHYSICAL EDUCATION 116

PART II

ESSAYS ON KINDRED SUBJECTS

PROGRESS: ITS LAW AND CAUSE 153

ON MANNERS AND FASHION 198

ON THE GENESIS OF SCIENCE 239

ON THE PHYSIOLOGY OF LAUGHTER 298

ON THE ORIGIN AND FUNCTION OF MUSIC 310

ORIGINAL PREFACE

TO

EDUCATION: INTELLECTUAL, MORAL, AND PHYSICAL

The four chapters of which this work consists, originally appeared as
four Review-articles: the first in the _Westminster Review_ for July
1859; the second in the _North British Review_ for May 1854; and the
remaining two in the _British Quarterly Review_ for April 1858 and for
Ap