... the book does an excellent job of meeting its stated goals, and I recommend it highly.

• 1. Introduction ; 2. The benefits of group formation ; 3. Some costs of grouping ; 4. The size of a group ; 5. Spatial heterogeneity of costs and benefits within groups ; 6. Heterogeneity and homogeneity of group membership ; 7. Evolutionary considerations ; 8. Environmental effects on grouping behaviour ; 9. Mechanisms ; 10. Conclusions

... the book does an excellent job of meeting its stated goals, and I recommend it highly.

• 1. Introduction ; 2. The benefits of group formation ; 3. Some costs of grouping ; 4. The size of a group ; 5. Spatial heterogeneity of costs and benefits within groups ; 6. Heterogeneity and homogeneity of group membership ; 7. Evolutionary considerations ; 8. Environmental effects on grouping behaviour ; 9. Mechanisms ; 10. Conclusions

... the book does an excellent job of meeting its stated goals, and I recommend it highly.

• 1. Introduction ; 2. The benefits of group formation ; 3. Some costs of grouping ; 4. The size of a group ; 5. Spatial heterogeneity of costs and benefits within groups ; 6. Heterogeneity and homogeneity of group membership ; 7. Evolutionary considerations ; 8. Environmental effects on grouping behaviour ; 9. Mechanisms ; 10. Conclusions