CONCLUSION 



finding out why offspring were like, or were not like, their parents. 

 We have gone much turtlier afield than we might have expected 

 or than some may have thought necessary. We believe, however, 

 that the unity of biology, or indeed the unity of science, which 

 has been gradually emerging from what we have said, is of just 

 as great importance to those who breed animals and plants or those 

 who treat the diseases of man as it is to the academic teacher, to 

 the student of society or to the philosopher of life. 



374 



