CiiAP. XIX. LAW OF BATTLE. 325 



jaws and teetli less and less. Tlie jaws, together with 

 their muscles, would then have become reduced through 

 disuse, as would the teeth through the not well under- 

 stood principles of correlation and the economy of 

 growth. ; for we everywhere see that parts which are 

 no longer of service are reduced in size. By such steps 

 tlie original inequality bstween the jaws and teeth in 

 the two sexes of mankind would ultimately have been 

 quite obliterated. The case is almost parallel with 

 that of many male Kuminants, in which the canine 

 teeth have been reduced to mere rudiments, or have 

 disappeared, apparently in consequence of the develop- 

 ment of horns. As the prodigious difference between 

 the skulls of the two sexes in the Gorilla and Orang, 

 stands in close relation with the development of the 

 immense canine teeth in the males, we may infer that 

 the reduction of the jaws and teeth in the early male 

 progenitors of man led to a most striking and favourable 

 change in his appearance. 



There can be little doubt that the greater size and 

 strength of man, in comparison with woman, together 

 with his broader shoulders, more developed muscles, 

 rugged outline of body, his greater courage and pug- 

 nacity, are all due in chief part to inheritance from 

 some early male progenitor, who, like the existing 

 anthropoid apes, was thus characterised. These cha- 

 racters will, however, have been preserved or even 

 augmented during the long ages whilst man was still 

 in a barbarous condition, by the^ strongest and boldest 

 men having succeeded best in the general struggle for 

 life, as well as in securing wives, and thus having left a 

 large number of offspring. It is not probable that the 

 greater strength of man was primarily acquired through 

 the inherited effects of his having worked harder than 

 woman for his own subsistence and that of his familv ; 



