EVOLUTION 



THE MASTER-KEY 



A DISCUSSION OF THE PRINCIPLE OF EVOLUTION AS 



ILLUSTRATED IN ATOMS, STARS, ORGANIC 



SPECIES, MIND, SOCIETY 



AND MORALS 



BY 



C. W. SALEEBY, M.D. (DIN.) 



AUTrf5R OF 



"THE CYCLE OF LIFE" 



LONDON AND NEW YORK 



HARPER & BROTHERS PUBLISHERS 



1906 



