He recognizes Mr. Spencer as his teacher and guide; but he has moulded the doctrines of his master into a popular form, surrounded them with fresh and vivid illustrations, pointed out their bearing upon great practical questions of the day, and amply supplied the reader with materials for forming an intelligent judgment with respect to their merits. Mr. Fiske is himself a thinker of rare acuteness and depth; his affluent store of knowledge is exhibited on every page; and his mastery of expression is equal to his subtlety of speculation.--GEORGE RIPLEY, in _Tribune_ (New York). Mr. Fiske's work ... is the first important contribution made by America to the evolution philosophy, ... and is well worth the study of all who wish to see at once the entire scope and purport of the scientific dogmatism of the day.--_Saturday Review_ (London). The author asserts that a system of philosophy has been constructed, out of purely scientific materials, ... which opposes a direct negative to every one of the theorems of which Positivism is made up.--_Scotsman_ (Edinburgh). Mr. Fiske is not a mere compiler from Mr. Spencer's works, nor is he simply a popularizer of an abstruse theory. He works his way to the chief results of Mr. Spencer's argument with independence and self-reliance. In many places he has presented his master's doctrine in new aspects or carried it forward to new conclusions, while throughout he adds something to the original from which he draws by freshness of illustration and individuality of literary style.... It is curious to note the almost fierce persistence with which the author returns again and again to an attack on the doctrines of Comte.... The most striking part of Mr. Fiske's social speculations is the hypothesis by which he proposes to bridge over the gulf which divides the merely gregarious and sympathetic brutes from morally constituted man (Part II., chap. xxii.).--JAMES SULLY, in _Examiner_ (London). Mr. Fiske is a disciple who thinks for himself, and who has no hesitation, when necessary, in criticising him whom he acknowledges as master.... He is so thoroughly imbued with the philosophic spirit that his work merits a careful perusal; it has the especial attraction of being written in excellent temper and admirable English.--_Daily News_ (London). Mr. Fiske's work shows a complete and independent mastery of the subject in all its bearings, together with a power of lucid and vigorous exposition unexcelled in any philosophical work with which we are acquainted.--_Daily Globe_ (Boston). It is our best American book on the evolution philosophy, and deserves to rank with the productions of the great English thinkers.--_Index_ (Boston). =DARWINISM AND OTHER ESSAYS.= New Edition, enlarged. 12mo, pp. 283, $2.00.