1. Problem and method -- 2. Property among the insects -- 3. Property among birds -- 4. Property among rodents, carnivores and apes -- 5. Magic, animism and property values -- 6. Sentiments of ownership in savage society -- 7. The social patterning of property values appendix : tables I-IV -- 8. Property and individual psychology -- 9. The genetic development of rights in property -- 10. Property and personality -- 11. Conclusion.