BIOLOGY AND SOCIOLOGY 103 



creative. It is better to say, with Lloyd Morgan, 

 that it is emergent. With new degrees of complex- 

 ity, new qualitative differences emerge. Thus the 

 sciences are a hierarchy, the subject-matter of one 

 constituting the foundation for the next in the series. 

 All that biology can do for sociology is to help her 

 to build her foundations solidly and correctly: but 

 we all know that without good foundations no build- 

 ing is safe. 



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Carr-Saunders, A. M., '21. 'The Population Problem." 

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Hobhouse, L. T, '01. "Mind in Evolution." London, 

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Huxley, J. S., M2. 'The Individual in the Animal King- 

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Keyser, '21. "Science" (N.S.) New York, 1921. 



Kropotkin, Prince, '08. "Mutual Aid, A Factor in Evo- 

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Lloyd Morgan, C, '23. "Emergent Evolution." Lon- 

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Marvin, F. S. "Progress and History (5th Imp.). Ox- 

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Radl, E., '09. "Geschichte der biologischen Theorien/' 

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Ritchie, '01. "Darwinism in Politics" (4th Ed.). Lon- 

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Roberts, Morley, '20. "Warfare in the Human Body.'* 

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