BIOLOGY AND PROGRESS 205 



the palteontologically extinct races of men. With 

 the advent of modern man, there was organized 

 an animal with relatively simple digestive organs, 

 teeth and limbs but with a more highly specialized 

 brain than any other living thing, and it is to this 

 latter organ that man owes his superiority. The 

 body of man has not undergone any marked 

 change as far back as records are available nor 

 should we expect his body to change much 

 in the future. It is more likely to deteriorate 

 than to advance because of his recent habits of 

 living in comfort and ease. The draft revealed 

 an amazing amount of physical unfitness in our 

 youths that furnishes a striking example of the 

 changes that are taking place in man in this age. 



Early in the history of man's life on the earth, 

 he became isolated into tribes which gradually 

 emerged into distinct races. But with modern 

 methods of communication, racial barriers are 

 breaking down and the distinctiveness of racial 

 type is slowly emerging into a type common to all 

 races. With all of these changes, however, the 

 result is clearly a man and there is nothing to 

 indicate that he will become anything else. Thus 

 when homo sapiens became distinct, definite limits 

 were established and beyond these he has never 

 gone. 



One usually thinks of man as free to do what 

 he will, go where he wishes and live as he chooses 



