MAN'S ANCESTORS 9 



This is the process which has been called " evolution by 

 natural selection." This is how, in my opinion, the changes 

 which are known to have taken place in animals in the course 

 of past ages have been brought about. Some scientists do 

 not attach quite as much importance as this to natural 

 selection : all of them, however, hold that it has had great 

 effects in the past. And all agree, therefore, that if selection 

 can now be appHed to the human race, in a somewhat 

 similar manner, it will have wonderful effects on future 

 generations. A beUef in evolution opens out before our 

 eyes possibilities of almost unlimited improvement in the 

 lot of mankind in the distant future. We are also thus led 

 to see that those who care for the future welfare of their 

 country should make it one of their main aims to attend to 

 the breed of their race. And eugenics tells us in what ways 

 we can do this. 



