A POWERFUL WORK FULL OF GENIUS AND ORIGINALITY

"The powerful personality of the author, the startling originality of his views, grip the reader and carry him, though his deepest convictions be outraged, protesting through the book."—Pall Mall Gazette.

"The discussion is bound to shake the whole world to its very center, and to result in a considerable readjustment of theories."—Pittsburg Times.

"It is the ablest and most scholarly writing of a great thinker."—Chicago Inter Ocean.

"No recent book on the subject is so novel, so readable, or so questionable."—New York Times Saturday Review.